Isokinetic Strength and Anaerobic Capacity (ISAC)

Bursa Uludag University

Status: Not yet enrolling

Conditions: Healthy Adult; Physical Condition

Study type: Observational

Funder types: Other

Identifiers

NCT07376551

E-87914409-050.04-117159

Details and patient eligibility

About

This study aims to investigate differences in isokinetic knee extensor and flexor strength parameters among recreationally active young adult males classified into low, moderate, and high anaerobic power groups based on relative peak power (W/kg) obtained from the Wingate Anaerobic Test. Eighty male participants aged 22-30 years, engaging in regular physical activity, will undergo body composition analysis, isokinetic strength testing at 60°/s, and a 30-second Wingate test performed on separate days. Participants will be grouped according to median-based anaerobic power classification to allow meaningful group comparisons. Group differences in peak torque and total work will be analyzed using ANOVA or non-parametric equivalents, and relationships between Wingate parameters and isokinetic strength will be examined using correlation analyses. The findings are expected to provide novel insights into the relationship between anaerobic power classification and lower-extremity muscle strength profiles, contributing to performance profiling and training planning in recreationally active populations.

Full description

This study will investigate the relationship between anaerobic power classification and isokinetic lower-extremity muscle strength in recreationally active young adult males. Participants will be classified into three anaerobic power groups (low, moderate, and high) based on relative peak power (W/kg) obtained from the Wingate Anaerobic Test. This classification approach is intended to move beyond single-variable correlation analyses commonly reported in the literature and to enable meaningful group-based comparisons of muscle strength profiles.

A total of 80 male participants aged 22-30 years who engage in regular physical activity at least twice per week will be recruited. Individuals with a history of serious orthopedic injury within the past six months, cardiovascular or respiratory disease, or regular medication use will be excluded. Body composition parameters will be assessed using bioelectrical impedance analysis prior to performance testing.

Isokinetic knee extensor and flexor strength of the dominant leg will be evaluated using concentric contractions at an angular velocity of 60°/s. Peak torque and total work values will be recorded as primary isokinetic strength outcomes. Anaerobic performance will be assessed on a separate day using a 30-second Wingate Anaerobic Test performed on a cycle ergometer, during which participants will be verbally encouraged to exert maximal effort throughout the test. Relative peak power, mean power, and fatigue index values will be obtained.

Participants will be grouped according to median-based classification of relative peak power values to facilitate comparison among anaerobic power levels in a sample of limited size. Differences in isokinetic strength parameters between groups will be analyzed using one-way analysis of variance or non-parametric equivalents when appropriate. Associations between Wingate-derived anaerobic parameters and isokinetic strength measures will also be examined using correlation analyses.

The results of this study are expected to clarify whether individuals with higher anaerobic power levels demonstrate superior isokinetic knee extensor and flexor strength profiles. The findings may contribute to a better understanding of the interaction between anaerobic performance capacity and lower-extremity muscle strength, with potential implications for performance profiling, training program design, and exercise-based rehabilitation strategies in recreationally active populations.

Enrollment: 80 estimated patients

Sex: Male

Ages: 20 to 32 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Male participants aged between 20 and 30 years

  • Moderately physically active individuals, as defined by the International Physical Activity Questionnaire (IPAQ)
  • Apparently healthy, with no known neurological, vestibular, or musculoskeletal disorders affecting balance
  • Ability to stand independently and complete balance assessments
  • Willingness to participate and provide written informed consent

Exclusion criteria

• History of lower-limb, spine, or pelvic injury or surgery within the past 6 months

  • Presence of acute or chronic pain affecting posture or balance
  • Diagnosed neurological, vestibular, or balance disorders
  • Use of medications or substances that may affect neuromuscular function or postural control
  • Participation in another clinical or observational study within the past 3 months

Trial design

80 participants in 3 patient groups

Low Anaerobic Power (LAP)

Description:

Participants are recreationally active young adult males classified into three cohorts based on relative peak power (W/kg) obtained from the Wingate Anaerobic Test. The low, moderate, and high anaerobic power groups represent individuals with differing anaerobic performance capacities derived from median-based classification. All participants are physically active but non-elite, with no recent history of orthopedic injury or cardiopulmonary disease. Comparisons among cohorts are conducted to examine differences in isokinetic knee extensor and flexor strength parameters.

Moderate Anaerobic Power (MAP)

Description:

Participants are recreationally active young adult males classified into three cohorts based on relative peak power (W/kg) obtained from the Wingate Anaerobic Test. The low, moderate, and high anaerobic power groups represent individuals with differing anaerobic performance capacities derived from median-based classification. All participants are physically active but non-elite, with no recent history of orthopedic injury or cardiopulmonary disease. Comparisons among cohorts are conducted to examine differences in isokinetic knee extensor and flexor strength parameters.

High Anaerobic Power (HAP)

Description:

Participants are recreationally active young adult males classified into three cohorts based on relative peak power (W/kg) obtained from the Wingate Anaerobic Test. The low, moderate, and high anaerobic power groups represent individuals with differing anaerobic performance capacities derived from median-based classification. All participants are physically active but non-elite, with no recent history of orthopedic injury or cardiopulmonary disease. Comparisons among cohorts are conducted to examine differences in isokinetic knee extensor and flexor strength parameters.