I'll hit 50 this summer. As Indy said, it's not the years, it's the miles that get me.
Tools make all the difference. But so does environment and prep.
What I have found that helps immensely:
- Get a thin panel or two of foil faced isocyanurate insulation (1/2") or so to lay on, foil side up. It reflects body heat and adds a little cushioning while giving you a surface that won't absorb oil. Seriously you won't believe the difference a little reflected heat makes.
- Invest in good lighting (I love my Astro cordless LED lights with the magnetic charging base. One of those where-have-you-been-all-my-life kind of tool upgrades).
- Safety squints with cheaters in them are nice.
- Always keep the foam earplugs handy.
- Go tool-free where possible. I use an oil drain valve partly because it makes half the oil change toolless and if you're on every-other filter changes, you can spill and fill without every touching a tool.
- A good rolling stool for things like brakes is a must-have.
- Never kneel directly on concrete. Always use some kind of cushion, even if it's just some cheap HF moving blankets.
- Tools
- Leverage reduces effort. Get the extra long wrenches or breaker bars. Capri has some affordable (but good) super long handle breakers. I think my 1/2" Capri has a 30" handle. I no longer try to break something loose with a stubby little box wrench unless there's reason to think it'll work.
- Power tools reduce effort also. Cordess is growing in popularity, but it's still nowhere near air tooling for lightweight and compact size for a given power. There's simply nothing cordless that can come close to something like the SP Air Ratchet. Bonus points to SP for this superbly compact 3/8 air gun.
- Your body
- Invest in maintaining some physical strength. Not necessarily muscles, but in tendons and ligaments. Think "stability" more than strength.
- Stretch frequently for range of motion
- don't get too heavy (I'm overweight enough I can already feel it getting in my way when working)