Immune Function and Muscle Adaptations to Resistance Exercise in Older Adults

Both arms will receive the tetanus, diptheria, and pertussis vaccination after two weeks of treatment with supplement or placebo

Both arms will receive a single bout of resistance exercise twice, before and after two weeks of treatment with supplement or placebo, and be evaluated for the response within blood and muscle

Both arms will receive 36 sessions of progressive high-intensity resistance exercise training (thigh muscle) over the course of approximately 12 weeks.

Both arms will continue to receive treatment with supplement or placebo for approximately 26 weeks after completion of the exercise training. During this time subjects will not be allowed to perform resistance exercise.

Subjects in the supplement group will consume orange-flavored Muscle Armor according to the manufacturer's directions: one serving (approximately 30g, i.e. one scoop provided with the product by its manufacturer), twice daily mixed with 12 ounces (oz) of water beginning after all baseline assessments are performed including assessment of the response to acute exercise and continuing until the end of study participation.

Subjects in the placebo group will consume orange-flavored Kool-Aid (Kraft Foods) according to the manufacturer's directions: one serving (approximately 13g, i.e. one scoop provided with the product by the pharmacy), twice daily mixed with 12 ounces (oz) of water beginning after all baseline assessments are performed including assessment of the response to acute exercise and continuing until the end of study participation.