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According to Harcourt Learning Direct Aerobic conditioning lasts about 48 hours in the body. So, aerobic exercise should be done at least 3 times per week, or every other day to gain results.
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Treat abdominals like any other muscle groups you train. For example: don't spend thirty minutes on an abdominal routine, and don't train your stomach muscles everyday. All muscle groups need at least one day's rest between workouts to allow repair, recovery, and growth. |
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Raising the temperature of the tendon increases the amount of permanent length change when you stretch. That's why it is important to warm up fully before stretching. In addition, stretching after a workout when your muscles are warm can help you to gain flexibility over a period of time. |
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If your muscles are sore more than two days small fiber tissues may be torn. You should stop exercising and treat the injury. The RICE method (rest, ice, compression, and elevation) can be used for some minor injuries. Consult a physician for proper treatment methods. |
