How are you managing to train each muscle group up to 3 times a week? Are you training groups of muscles in the same session?

Only advice on the diet side of things given your workout frequency is to ensure you're getting vitamins, rest and plenty of carbs/water.

Also are you monitoring your health in any way? You're on the older side of things and yes your hormone stack is gentle health wise but it would be a good to test your blood pressure multiple times a week to make sure it's not getting too high (everyone should do this not just older folk), you've mentioned you're a runner so I'd presume you're pretty healthy but it's always good to monitor.