Final answer:
Isotonic exercise is the best for developing strength as it involves muscle contractions and joint movements. Leg exercises alone and stretching exercises only have limited impact on strength development. Long-distance running, on the other hand, primarily works on cardiovascular health and endurance rather than muscle strength.
Step-by-step explanation:
Isotonic exercise is the best for developing strength. Isotonic exercises involve both muscle contractions and joint movements, such as weightlifting or push-ups. These exercises help build muscle strength and increase endurance.
Leg exercises alone may improve lower body strength, but it is important to have a balanced workout routine that targets all muscle groups. Similarly, stretching exercises only focus on flexibility and do not primarily contribute to strength development.
Long-distance running is beneficial for cardiovascular health and endurance, but it does not specifically focus on building muscle strength.
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