...Poodles.
http://www.google.com/#q=man+bun+at+gym
Indoor gyms do have the benefit of providing equipment for isolating specific muscle groups - facilitating injury prevention for actual manly activities.
But my favorite "Gym" routine these days involves about 6 hours a week with shovel and a wheelbarrow.
Shovel, wheel, dump, repeat.
For those still young enough to avoid injuries, shovel, wheel, dump, repeat will help. But, I do believe that many of us are taking better care of ourselves than our smoking, drinking grandparents. Unfortunately, rates of obesity have skyrocketed. People are eating junk food. It may be a worse habit than smoking.