after George had a heart attack at age 40, he decided to change his lifestyle. which form of physical activity would best help him improve the health of his heart ? a)swim for 20 mins. Tuesday and friday; lift Weights for 20 minutes Monday , Wednesday, Saturday. b) swim for 20 minutes tues. and Friday; run or walk briskly for 30 mins Saturday Wednesday and Saturday c) ride and exercise bike for 20 mins Tuesday and Friday ; walk leisurely for 20 mins Sunday Monday Wednesday and Saturday