A high proportion of men in this demographic have knee and lower back issues, so this may need to be taken into account when designing an exercise program for you. Where possible however, I will recommend incorporating whole body strength exercises as part of the larger program that I will design for you to encourage muscle growth (increasing muscle mass increases metabolism).
If you find the idea of strength/weights training daunting, don’t worry, I will only incorporate it into your program if you are comfortable with it, and if it is suitable for you.