Taking in less energy in the form of food than you use up in activity( basic metabolism plus extra ) is the only way to lose weight,Its calculated at 80% nutrition and 20% activity.Armchair exercises will help your metabolism speed up and tone your muscles.,and hopefully increase your stamina but it is the " diet" that will take weight off.It can be hard to lose weight Good Luck.Can you talk to doc/dietitian before you start?.

Outstanding JanMarieOliver!

I started silver sneakers chair excersizes then went to standing. Going at my own pace.

Can you share?

I've strengthened my muscles with these excersizes.