International Journal of Sports Physiology and Performance

Article	Citations
Defining Training and Performance Caliber: A Participant Classification Framework	817
25 Years of Session Rating of Perceived Exertion: Historical Perspective and Development	80
Hormonal Contraceptive Use, Menstrual Dysfunctions, and Self-Reported Side Effects in Elite Athletes in Denmark	51
How Much Sleep Does an Elite Athlete Need?	48
Training Periodization, Methods, Intensity Distribution, and Volume in Highly Trained and Elite Distance Runners: A Systematic Review	42
Superior Changes in Jump, Sprint, and Change-of-Direction Performance but Not Maximal Strength Following 6 Weeks of Velocity-Based Training Compared With 1-Repetition-Maximum Percentage-Based Training	40
Implementing Strength Training Strategies for Injury Prevention in Soccer: Scientific Rationale and Methodological Recommendations	38
Monitoring Practices of Training Load and Biological Maturity in UK Soccer Academies	37
Training Load and Performance Impairments in Professional Cyclists During COVID-19 Lockdown	35
Single and Combined Effect of Acute Sleep Restriction and Mental Fatigue on Basketball Free-Throw Performance	34
Effects of Caffeine Ingestion on Physical Performance in Elite Women Handball Players: A Randomized, Controlled Study	31
World-Class Sprinters’ Careers: Early Success Does Not Guarantee Success at Adult Age	30
Can We Modify Maximal Speed Running Posture? Implications for Performance and Hamstring Injury Management	28
The Physical Demands and Power Profile of Professional Men’s Cycling Races: An Updated Review	27
Concurrent Validity and Reliability of Sprinting Force–Velocity Profile Assessed With GPS Devices in Elite Athletes	26
Improved Strength and Recovery After Velocity-Based Training: A Randomized Controlled Trial	25
Validity of the Training-Load Concept	25
Coping With the “Small Sample–Small Relevant Effects” Dilemma in Elite Sport Research	24
Rate of Force Development, Muscle Architecture, and Performance in Elite Weightlifters	24
Maximum Strength, Relative Strength, and Strength Deficit: Relationships With Performance and Differences Between Elite Sprinters and Professional Rugby Union Players	22
Power Profiling, Workload Characteristics, and Race Performance of U23 and Professional Cyclists During the Multistage Race Tour of the Alps	22
Bench Press 1-Repetition Maximum Estimation Through the Individualized Load–Velocity Relationship: Comparison of Different Regression Models and Minimal Velocity Thresholds	22
Injury Prediction in Competitive Runners With Machine Learning	22
Eleven Years’ Monitoring of the World’s Most Successful Male Biathlete of the Last Decade	21
Monitoring Training Volume Through Maximal Number of Repetitions or Velocity-Based Approach	20

Elite Junior Throwers Unlikely to Remain at the Top Level in the Senior Category	20
The Influence of Exercise Modality on Training Load Management	19
Countermovement Jump Height in National-Team Athletes of Various Sports: A Framework for Practitioners and Scientists	19
Performance Assessment for Rock Climbers: The International Rock Climbing Research Association Sport-Specific Test Battery	19
Determinant Physical Factors of Tennis Serve Velocity: A Brief Review	19
A Combined Sleep Hygiene and Mindfulness Intervention to Improve Sleep and Well-Being During High-Performance Youth Tennis Tournaments	19
Training Intensity Distribution, Training Volume, and Periodization Models in Elite Swimmers: A Systematic Review	19
Brain Endurance Training Improves Physical, Cognitive, and Multitasking Performance in Professional Football Players	18
Overtraining Syndrome Symptoms and Diagnosis in Athletes: Where Is the Research? A Systematic Review	18
Body Composition, Energy Availability, Training, and Menstrual Status in Female Runners	18
The Record Power Profile of Male Professional Cyclists: Normative Values Obtained From a Large Database	18
The Record Power Profile of Male Professional Cyclists: Fatigue Matters	18
Number of Repetitions Performed Before and After Reaching Velocity Loss Thresholds: First Repetition Versus Fastest Repetition—Mean Velocity Versus Peak Velocity	17
Caffeine Ingestion Improves Performance During Fitness Tests but Does Not Alter Activity During Simulated Games in Professional Basketball Players	17
Train the Engine or the Brakes? Influence of Momentum on the Change of Direction Deficit	17
Power Profiling in U23 Professional Cyclists During a Competitive Season	17
Monitoring Cardiorespiratory Fitness in Professional Soccer Players: Is It Worth the Prick?	17
Positional Match Running Performance and Performance Profiles of Elite Female Field Hockey	16
Pooled Versus Individualized Load–Velocity Profiling in the Free-Weight Back Squat and Power Clean	16
Managing the Training Process in Elite Sports: From Descriptive to Prescriptive Data Analytics	16
Physical Demands and Performance Indicators in Male Professional Cyclists During a Grand Tour: WorldTour Versus ProTeam Category	16
COVID-19 Lockdown: A Global Study Investigating the Effect of Athletes’ Sport Classification and Sex on Training Practices	16
An All-Out Test to Determine Finger Flexor Critical Force in Rock Climbers	16
Physical Demands and Internal Response in Football Sessions According to Tactical Periodization	16
Cycling Performance and Training Load: Effects of Intensity and Duration	16
9/3-Minute Running Critical Power Test: Mechanical Threshold Location With Respect to Ventilatory Thresholds and Maximum Oxygen Uptake	16
The Utility of Mixed Models in Sport Science: A Call for Further Adoption in Longitudinal Data Sets	15
The Use of Recovery Strategies in Professional Soccer: A Worldwide Survey	15
Physiological Indicators of Trail Running Performance: A Systematic Review	15
Assessing Interlimb Jump Asymmetry in Young Soccer Players: The My Jump 2 App	15
Response of Blood Biomarkers to Sprint Interval Swimming	14
External, Internal, Perceived Training Loads and Their Relationships in Youth Basketball Players Across Different Positions	14
Nonergodicity in Load and Recovery: Group Results Do Not Generalize to Individuals	14
Stressed and Not Sleeping: Poor Sleep and Psychological Stress in Elite Athletes Prior to the Rio 2016 Olympic Games	14
Swing Phase Mechanics of Maximal Velocity Sprints—Does Isokinetic Lower-Limb Muscle Strength Matter?	13
Effects of Presession Well-Being Perception on Internal Training Load in Female Volleyball Players	13
The Influence of Menstrual Cycle on Bioimpedance Vector Patterns, Performance, and Flexibility in Elite Soccer Players	13
Strength and Power Testing of Athletes: A Multicenter Study of Test–Retest Reliability	13
Menthol Mouth Rinsing and Cycling Performance in Females Under Heat Stress	13
Change-of-Direction Ability of Para-Footballers With Cerebral Palsy Under a New Evidence-Based and Sport-Specific Classification System	13
The W′ Balance Model: Mathematical and Methodological Considerations	13
Training Practices of Football Players During the Early COVID-19 Lockdown Worldwide	13
Should We Base Training Prescription on the Force–Velocity Profile? Exploratory Study of Its Between-Day Reliability and Differences Between Methods	13
The Effects of an Acute “Train-Low” Nutritional Protocol on Markers of Recovery Optimization in Endurance-Trained Male Athletes	12
Acute Sleep Restriction Affects Sport-Specific But Not Athletic Performance in Junior Tennis Players	12
Both Caffeine and Placebo Improve Vertical Jump Performance Compared With a Nonsupplemented Control Condition	12
Changes in the Load–Velocity Profile Following Power- and Strength-Oriented Resistance-Training Programs	12
A Comment on “A New Taxonomy for Postactivation Potentiation in Sport”	12
Are Genome-Wide Association Study Identified Single-Nucleotide Polymorphisms Associated With Sprint Athletic Status? A Replication Study With 3 Different Cohorts	12
Effects of Highly Cushioned and Resilient Racing Shoes on Running Economy at Slower Running Speeds	12

Do Race Results in Youth Competitions Predict Future Success as a Road Cyclist? A Retrospective Study in the Italian Cycling Federation	12
Caffeine Use or Napping to Enhance Repeated Sprint Performance After Partial Sleep Deprivation: Why Not Both?	12
The Physiological Nature of Mental Fatigue: Current Knowledge and Future Avenues for Sport Science	12
Capsaicinoid and Capsinoids as an Ergogenic Aid: A Systematic Review and the Potential Mechanisms Involved	12
Using Submaximal Exercise Heart Rate for Monitoring Cardiorespiratory Fitness Changes in Professional Soccer Players: A Replication Study	12
Relationships Between Different Internal and External Training Load Variables and Elite International Women’s Basketball Performance	12
How to Succeed as an Athlete: What We Know, What We Need to Know	11
Wish List for Improving the Quality of Statistics in Sport Science	11
A Systematic Review on Markers of Functional Overreaching in Endurance Athletes	11
Environmental and Psychophysical Heat Stress in Adolescent Tennis Athletes	11
Physiological Profiling and Energy System Contributions During Simulated Epée Matches in Elite Fencers	11
Lifting Velocity as a Predictor of the Maximum Number of Repetitions That Can Be Performed to Failure During the Prone Bench Pull Exercise	11
Dimensionality Reduction for Countermovement Jump Metrics	11
Upper-Limb Force–Time Characteristics Determine Serve Velocity in Competition Tennis Players	11
The Influence of Recruitment Age and Anthropometric and Physical Characteristics on the Development Pathway of English Academy Football Players	11
Body Composition Over the Menstrual and Oral Contraceptive Cycle in Trained Females	10
Managing Load to Optimize Well-Being and Recovery During Short-Term Match Congestion in Elite Basketball	10
Does Cold-Water Immersion After Strength Training Attenuate Training Adaptation?	10
Relationship Between Subjective and External Training Load Variables in Youth Soccer Players	10
Don’t Throw the Baby Out With the Bathwater: Talent in Swimming Sprinting Events Might Be Hidden at Early Age	10
Specific Adaptations to 0%, 15%, 25%, and 50% Velocity-Loss Thresholds During Bench Press Training	10
Effectiveness of Accentuated Eccentric Loading: Contingent on Concentric Load	10
How One Feels During Resistance Exercises: A Repetition-by-Repetition Analysis Across Exercises and Loads	10
Postexercise Hot-Water Immersion Does Not Further Enhance Heat Adaptation or Performance in Endurance Athletes Training in a Hot Environment	10
Ultrashort Versus Criterion Heart Rate Variability Among International-Level Girls’ Field Hockey Players	10
The Effects of Combined Balance and Complex Training Versus Complex Training Only on Measures of Physical Fitness in Young Female Handball Players	10
The Dose–Response of the Nordic Hamstring Exercise on Biceps Femoris Architecture and Eccentric Knee Flexor Strength: A Randomized Interventional Trial	10
Training Load, Neuromuscular Fatigue, and Well-Being of Elite Male Volleyball Athletes During an In-Season Mesocycle	10
Best-Practice Coaches: An Untapped Resource in Sport-Science Research	10
Time Course of Neuromuscular, Hormonal, and Perceptual Responses Following Moderate- and High-Load Resistance Priming Exercise	10
The Business End of the Season: A Comparison Between Playoff and Regular-Season Workloads in Professional Basketball Players	10
Bilateral Dorsolateral Prefrontal Cortex High-Definition Transcranial Direct-Current Stimulation Improves Time-Trial Performance in Elite Cyclists	10
Variation in Physical Performance of Futsal Players During Congested Fixtures	10
The Association Between Sleep and In-Game Performance in Basketball Players	9
Season-Long Heart-Rate Variability Tracking Reveals Autonomic Imbalance in American College Football Players	9
Physical Performance Differences Between Spanish Selected and Nonselected Para-Footballers With Cerebral Palsy for the National Team	9
A Maximal Rowing Ergometer Protocol to Predict Maximal Oxygen Uptake	9
Impact of Face Masks on Exercise Capacity and Lactate Thresholds in Healthy Young Adults	9
The Effects of Lifting Lighter and Heavier Loads on Subjective Measures	9
Relationship Between Game Load and Player’s Performance in Professional Basketball	9
Dose–Response Relationship Between Velocity Loss During Resistance Training and Changes in the Squat Force–Velocity Relationship	9
Preseason Training Improves Perception of Fatigue and Recovery From a Futsal Training Session	9
Mental Fatigue Over 2 Elite Netball Seasons: A Case for Mental Fatigue to be Included in Athlete Self-Report Measures	9
The Anthropometric, Physiological, and Strength-Related Determinants of Handcycling 15-km Time-Trial Performance	9
Concurrent Validity of a Continuous Glucose-Monitoring System at Rest and During and Following a High-Intensity Interval Training Session	9
Cross-Sectional Differences in Race Demands Between Junior, Under 23, and Professional Road Cyclists	9
Effects of Velocity Loss Threshold Within Resistance Training During Concurrent Training on Endurance and Strength Performance	9
Relationship Between External and Internal Load Measures in Youth Beach Handball	9
Age- and Sex-Related Differences in Recovery From High-Intensity and Endurance Exercise: A Brief Review	9
Intensified Training Supersedes the Impact of Heat and/or Altitude for Increasing Performance in Elite Rugby Union Players	9
Fitness Determinants of Repeated High-Intensity Effort Ability in Elite Rugby Union Players	9
Mental Fatigue: The Cost of Cognitive Loading on Weight Lifting, Resistance Training, and Cycling Performance	9
Training Quality—What Is It and How Can We Improve It?	9
Energetic Profiles of the Yo-Yo Intermittent Recovery Tests 1 and 2	8
Performance Determinants in Trail-Running Races of Different Distances	8
Microdosing: Old Wine in a New Bottle? Current State of Affairs and Future Avenues	8
Physiological Determinants of Ultramarathon Trail-Running Performance	8
The Record Power Profile in Professional Female Cyclists: Normative Values Obtained From a Large Database	8
Symptoms of Overtraining in Resistance Exercise: International Cross-Sectional Survey	8
Effects of a Congested Fixture Period on Speed and Power Performance of Elite Young Soccer Players	8
Training Characteristics of a World Championship 5000-m Finalist and Multiple Continental Record Holder Over the Year Leading to a World Championship Final	8
Anthropometric Profiles and Physical Characteristics in Competitive Female English Premiership Rugby Union Players	8
Not All About the Effort? A Comparison of Playing Intensities During Winning and Losing Game Quarters in Basketball	8
Comparing Weekly Training and Game Demands According to Playing Position in a Semiprofessional Basketball Team	8
Optimal Minimum Velocity Threshold to Estimate the 1-Repetition Maximum: The Case of the Smith Machine Bench Press Exercise	8
Indirect Markers of Muscle Damage Throughout the Menstrual Cycle	8
Power Profile of Top 5 Results in World Tour Cycling Races	8
Reliability and Sensitivity of Nocturnal Heart Rate and Heart-Rate Variability in Monitoring Individual Responses to Training Load	8
Effects of Plyometric Training Direction on Physical Performance in Basketball Players	8
Does a Loaded Warm-Up Influence Jump Asymmetry and Badminton-Specific Change of Direction Performance?	8
Improving Utilization of Maximal Oxygen Uptake and Work Economy in Recreational Cross-Country Skiers With High-Intensity Double-Poling Intervals	8
The Sleep of Elite Australian Rules Footballers During Preseason: A Comparison of Men and Women	8
Analysis of Recovery Methods’ Efficacy Applied up to 72 Hours Postmatch in Professional Football: A Systematic Review With Graded Recommendations	8
Effects of Unloaded Sprint and Heavy Sled Training on Sprint Performance in Physically Active Women	8
Is the Concept, Method, or Measurement to Blame for Testing Error? An Illustration Using the Force-Velocity-Power Profile	8
Effect of Moderate- or High-Intensity Inspiratory Muscle Strength Training on Maximal Inspiratory Mouth Pressure and Swimming Performance in Highly Trained Competitive Swimmers	8
The Relationships Between Training Load, Type of Sport, and Sleep Among High-Level Adolescent Athletes	8
Relationship Between Wellness Index and Internal Training Load in Soccer: Application of a Machine Learning Model	8
Hamstring and Quadriceps Muscle Strength in Youth to Senior Elite Soccer: A Cross-Sectional Study Including 125 Players	8
Aerobic Capacity According to Playing Role and Position in Elite Female Basketball Players Using Laboratory and Field Tests	8

Effect of Warm-Up and Sodium Bicarbonate Ingestion on 4-km Cycling Time-Trial Performance	8
Effects of Exercise Sequence and Velocity Loss Threshold During Resistance Training on Following Endurance and Strength Performance During Concurrent Training	7
Longitudinal Relationships Between Maturation, Technical Efficiency, and Performance in Age-Group Swimmers: Improving Swimmer Evaluation	7
Stability of Heart Rate at Physiological Thresholds Between Temperate and Heat Stress Environments in Endurance-Trained Males	7
Bioenergetic Analysis and Fatigue Assessment During the Fran Workout in Experienced Crossfitters	7
Self-Selecting the Number of Repetitions in Potentiation Protocols: Enhancement Effects on Jumping Performance	7
The Evolution of World-Class Endurance Training: The Scientist’s View on Current and Future Trends	7
An Evaluation of Training Load Measures for Drills in Women’s Collegiate Lacrosse	7
Five-Minute Power-Based Test to Predict Maximal Oxygen Consumption in Road Cycling	7
Testosterone and Dihydrotestosterone Changes in Male and Female Athletes Relative to Training Status	7
Effect of Previous-Day Alcohol Ingestion on Muscle Function and Performance of Severe-Intensity Exercise	7
Peak Blood Lactate Concentration and Its Arrival Time Following Different Track Running Events in Under-20 Male Track Athletes	7
Influence of the Menstrual Cycle Phase on Marathon Performance in Recreational Runners	7
Maturity-Associated Differences in Match Running Performance in Elite Male Youth Soccer Players	7
Recovery During a Congested Schedule and Injury in Professional Football	7
Performance Analysis in Football-Specific Tests by Para-Footballers With Cerebral Palsy: Implications for Evidence-Based Classification	7
High-Acceleration Movement, Muscle Damage, and Perceived Exertion in Basketball Games	7
Field-Derived Maximal Power Output in Cycling: An Accurate Indicator of Maximal Performance Capacity?	7
Demands of the Tour de France: A Case Study of a World-Class Sprinter (Part I)	7
Effects of Weight Cutting on Exercise Performance in Combat Athletes: A Meta-Analysis	7
Effect of a Marathon on Skin Temperature Response After a Cold-Stress Test and Its Relationship With Perceptive, Performance, and Oxidative-Stress Biomarkers	7
Continuous Jumps Enhance Twitch Peak Torque and Sprint Performance in Highly Trained Sprint Athletes	7
Data Reduction Approaches to Athlete Monitoring in Professional Australian Football	7
Power Road-Derived Physical Performance Parameters in Junior, Under-23, and Professional Road Cycling Climbers	7
The Optimum Power Load: A Simple and Powerful Tool for Testing and Training	7
Biophysical Impact of 5-Week Training Cessation on Sprint Swimming Performance	7
The Effect of Resistance Exercise Priming in the Morning on Afternoon Sprint Cross-Country Skiing Performance	7
Increasing Oxygen Uptake in Cross-Country Skiers by Speed Variation in Work Intervals	7
The Relevance of Muscle Fiber Type to Physical Characteristics and Performance in Team-Sport Athletes	7
Performance Characteristics of TOP5 Versus NOT-TOP5 Races in Female Professional Cycling	7
Training-Load Management in Rhythmic Gymnastics: Practices and Perceptions of Coaches, Medical Staff, and Gymnasts	7
Effects of Different In-Season Strength Training Methods on Strength Gains and Water Polo Performance	7
The Effects of Anaerobic Swim Ergometer Training on Sprint Performance in Adolescent Swimmers	7
Validity of Force–Velocity Profiling Assessed With a Pneumatic Leg Press Device	7
Can Genetic Testing Predict Talent? A Case Study of 5 Elite Athletes	7
Does Caffeine Consumption Influence Postcompetition Sleep in Professional Rugby League Athletes? A Case Study	7
Durability in Professional Cyclists: A Field Study	7
Running Your Best Triathlon Race	7
Effect of Tethered Swimming as Postactivation Potentiation on Swimming Performance and Technical, Hemophysiological, and Psychophysiological Variables in Adolescent Swimmers	6
Small-Sided Games Are Not as Effective as Intermittent Running to Stimulate Aerobic Metabolism in Prepubertal Soccer Players	6
Internal Load of Male Varsity Ice Hockey Players During Training and Games Throughout an Entire Season	6
Case Study: A Jaw-Protruding Dental Splint Improves Running Physiology and Kinematics	6
A Novel Approach to Determining the Alactic Time Span in Connection with Assessment of the Maximal Rate of Lactate Accumulation in Elite Track Cyclists	6
Weekly Fluctuations in Salivary Hormone Responses and Their Relationships With Load and Well-Being in Semiprofessional, Male Basketball Players During a Congested In-Season Phase	6
Fitness Tests and Match Performance in a Male Ice Hockey National League	6
Bilateral Throw Execution in Young Judokas for a Maximum All Year Round Result	6
Effect of Resistance-Training Programs Differing in Set Configuration on Maximal Strength and Explosive-Action Performance	6
Peer Presence Increases Session Ratings of Perceived Exertion	6
“Living High-Training Low” for Olympic Medal Performance: What Have We Learned 25 Years After Implementation?	6
Use of Numerically Blinded Ratings of Perceived Exertion in Soccer: Assessing Concurrent and Construct Validity	6
Heat Added to Repeated-Sprint Training in Hypoxia Does Not Affect Cycling Performance	6
Cross-Country Skiers With a Fast-Start Pacing Pattern Increase Time-Trial Performance by Use of a More Even Pacing Strategy	6
The Science of Handcycling: A Narrative Review	6
Strength Training Improves Exercise Economy in Triathletes During a Simulated Triathlon	6
Anthropometric and Power-Related Attributes Differ Between Competition Levels in Age-Matched Under-19-Year-Old Male Basketball Players	6
Longitudinal Performance Analysis in Ultra-Triathlon of the World’s 2 Best Master Triathletes	6
On-Field Methodological Approach to Monitor the Menstrual Cycle and Hormonal Phases in Elite Female Athletes	6
Marathon Performance and Pacing in the Doha 2019 Women’s IAAF World Championships: Extreme Heat, Suboptimal Pacing, and High Failure Rates	6
Does Complex Training Enhance Vertical Jump Performance and Muscle Power in Elite Male Volleyball Players?	6
A Systems Analysis Critique of Sport-Science Research	6
There Is No Global Running Pattern More Economic Than Another at Endurance Running Speeds	6
Influence of Contextual Factors, Technical Performance, and Movement Demands on the Subjective Task Load Associated With Professional Rugby League Match-Play	6
Sport-Science Research on Female Athletes: Dealing With the Paradox of Concurrent Increases in Quantity and Quality	6
Morning Priming Exercise Strategy to Enhance Afternoon Performance in Young Elite Soccer Players	6
Effects of Increased Load of Low- Versus High-Intensity Endurance Training on Performance and Physiological Adaptations in Endurance Athletes	6
Player Wellness (Soreness and Stress) and Injury in Elite Junior Australian Football Players Over 1 Season	6
Validating an Adjustment to the Intermittent Critical Power Model for Elite Cyclists—Modeling W′ Balance During World Cup Team Pursuit Performances	6
Effects of Bilateral Dorsolateral Prefrontal Cortex High-Definition Transcranial Direct-Current Stimulation on Physiological and Performance Responses at Severe-Intensity Exercise Domain in Elite Road	6
Is Rating of Perceived Exertion a Valuable Tool for Monitoring Exercise Intensity During Steady-State Conditions in Elite Endurance Athletes?	6
Competition Between Desired Competitive Result, Tolerable Homeostatic Disturbance, and Psychophysiological Interpretation Determines Pacing Strategy	6
The Relationship Between Neuromuscular Function and the W′ in Elite Cyclists	6
Sleep Characteristics of Elite Youth Athletes: A Clustering Approach to Optimize Sleep Support Strategies	6
Power–Force–Velocity Profiling as a Function of Used Loads and Task Experience	6
Physical and Mental Fatigue Reduce Psychomotor Vigilance in Professional Football Players	6
Indian Endurance Athletes’ Menstrual Cycle: Practices, Knowledge, Communication, Health, and Changes in Perceptions Across the Phases	6
Effects of 2 Intersection Strategies for Physical Recovery in Jiu-Jitsu Athletes	6
Association of Jumping Ability and Maximum Strength With Dive Distance in Swimmers	6
Case Report: Heat Suit Training May Increase Hemoglobin Mass in Elite Athletes	6
Effects of COVID-19 Lockdown and a Subsequent Retraining Period on Elite Athletes’ Workload, Performance, and Autonomic Responses: A Case Series	6
Postmatch Recovery Practices Carried Out in Professional Football: A Survey of 56 Portuguese Professional Football Teams	6
Cardiorespiratory Responses to Constant and Varied-Load Interval Training Sessions	6
The Self-Paced Submaximal Run Test: Associations With the Graded Exercise Test and Reliability	6