Walker was then told he would be sitting at a desk in the middle of the office rather ... Young told Walker he could not understand why "a man of your age" — Walker was 53 at the time ...

With the exception of the plank, each exercise should be done for 10-15 repetitions. If an exercise alternates between sides, perform 10-15 repetitions on each side. Try holding the plank for 15-30 ...