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Change in femoral cartilage cross-sectional area after aerobic and resistance exercise.
International Journal of Sports Medicine 2024 April 17
We compared the immediate response and recovery of femoral cartilage morphology following aerobic or resistance exercise to a control condition. Fifteen healthy young males (23.9 years; 170.1 cm; 69.7 kg) visited the laboratory three separate days and randomly performed one of the 30 min exercise aerobic exercise (treadmill running); resistance exercises (leg presses, back squats, and knee extensions); or seated rest as the control, each followed by the 50 min recovery. Ultrasonographic images of the femoral cartilage cross-sectional area (CSA) were obtained before and after exercise and every 5 min thereafter. To test exercise effects over time, a mixed model analysis of variance and Tukey-Kramer post-hoc tests were performed (p<0.05). The femoral cartilage CSA was different (condition × time: F34,742=4.30, p<0.0001) that the femoral cartilage CSA was decreased after the aerobic (-5.8%, p<0.0001) and the resistance (-3.4%, p=0.04) exercises, compared to the pre-exercise levels. Deformed femoral cartilage CSA took 35- and 10 min to return to the pre-exercise levels after aerobic and resistance exercises (p>0.09), respectively. Thirty minutes of moderate exertion performing aerobic or resistance exercises immediately reduced the femoral cartilage CSA. A rest period ranging from 10 to 35 min was required for cartilage recovery after weight-bearing exercises.
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