The 5-week quadriceps-strengthening exercise program
involved standardized progressive-resistance training. After
5 minutes of warm-up, Mr. T performed knee extensions
using Keiser knee-extension equipment. The exercise
protocol included 10 sessions that required the elder to
lift and lower the training loads separately for each leg to
equalize the relative training stimulus for each limb. Mr. T
performed three sets of eight repetitions on two nonsequential
days per week for 5 weeks. His training loads began
at 50% of his predetermined one-repetition
maximum (1RM) and should gradually progress to heavier
loads, which were decided based on Mr. T's tolerance
of training loads and whether he showed any pain behaviors,
such as refusing to exercise, guarding or rubbing the
knee, showing nonverbal vocalizations (sighs, gasps,
moans, groans, and cries) and facial grimacing or wincing