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Strength development following a six-week risk reduction athletic development training program in men and women
Christopher J Cleary1, Krisha Crane2, Lisa M Vopat3
1Exercise and Human Performance Laboratory, Department of Health, Sport, and Exercise Sciences, University of Kansas Edwards Campus, 12604 Quivira Rd, Overland Park, KS, 66213, USA.
Sports Medicine and Health Science
|April 23, 2025
Summary
A 6-week athletic development program improved maximal isometric strength in post-rehabilitative and healthy athletes. However, strength differences between limbs persisted in post-rehabilitative individuals.
Area of Science:
- Sports Medicine
- Exercise Physiology
- Rehabilitation Science
Background:
- Athletic development programs aim to enhance performance and reduce injury risk.
- Maximal isometric strength is a key indicator of muscle function and recovery.
Purpose of the Study:
- To evaluate the impact of a 6-week athletic development program on maximal isometric strength in athletes.
- To compare strength changes between post-rehabilitative and healthy athletes.
- To assess between-limb strength symmetry after the training intervention.
Main Methods:
- Retrospective analysis of data from an athlete management system.
- Inclusion of 37 athletes (13-28 years old), including 31 post-rehabilitative and 6 healthy individuals.
- Measurement of maximal isometric quadriceps and hamstrings strength bilaterally before and after the 6-week, 12-session program.
- Statistical analysis using repeated measures analyses of variance (ANOVA) with significance set at p ≤ 0.05.
Main Results:
- Post-rehabilitative athletes showed significant increases in quadriceps (4.2 ± 0.7 kg) and hamstrings strength (4.5 ± 0.9 kg) (p < 0.01).
- Operative limbs in post-rehabilitative athletes remained weaker in quadriceps strength (2.9 ± 0.7 kg) compared to non-operative limbs (p < 0.01).
- Healthy athletes demonstrated improved hamstring strength (5.3 ± 1.4 kg) (p = 0.01) but no significant change in quadriceps strength.
Conclusions:
- The athletic development program effectively improved maximal isometric strength in both post-rehabilitative and healthy athletes.
- Despite strength gains, significant between-limb strength asymmetries persisted in the post-rehabilitation group, particularly for quadriceps strength.
- Further targeted interventions may be necessary to fully address strength deficits and asymmetries in athletes recovering from knee surgery.
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