At Sand & Steel, the majority of my clients are in their 50s, 60s, and 70s. Most people start feeling the effects of aging in their mid-thirties, but by age 50 they really start to notice a change. It becomes harder to lose weight, injuries heal slower, and energy levels generally decline. If you are going to be working with clients in this age population, you’ll need to know how to perform a senior fitness assessment. Here’s how it should be done.