Difficult to say, but speaking as a slightly overweight man in his late fifties (1.9 m, 98 kg), I enjoy it! And isn’t that half the battle with exercise?

The United Kingdom National Health Service (NHS) maintains guidelines on their website.

The BBC series 'Trust me I'm a Doctor', hosted by Dr Michael Mosley, conducted a 12 week experiment to compare the effect of exercise on two groups of volunteers between the ages of 65 and 75. Neither group had previously conducted regular exercise. One group participated in Zumba classes and the other in Tai Chi.