For starters, before Dev and comany jump all over my back, weights, by and large, do not help triathlon performance. heavy quats will not help your IM bike leg.
Having said that, I want to start lifting for general fitness. I used to lift quite a bit - I was a gym rat from about age 12 to 30, then I just stopped. Anyway, I have gotten exceptionaly weak.
1st and foremost, all I want equipment wise is a small bench (no rack) with a set of those easy adjust dumbells.
So I was thinking mainly multigroup stuff, and doing one set to failure on each muscle group.
1 - a squat exercize
2 - a bench press exercize
3 - a rowing exercize
4 - crunches
5 - low back (already covered in squat?)
Think that’s good? Hit an exercize every 2 minutes?
2 Minutes for each exercise can be too much time. Back when I weightlifted for water polo, we would do circuits with 30 seconds for each exercise.
30s bench, rotate, 30s curls, rotate, 30s squats, etc. No rest, just keep going. 30s is more than enough time to get in a good number of reps.
I would save money on the equipment and do without, though. If you only plan on doing 10 minute workouts, weights and a bench aren’t worth it.
Do 25 push-ups, then 25-50 abs (crunches, leg lifts, windshield wipers, hip raises, etc. Just do something different each time). Keep going back and forth until the 10 minutes are up, with no rest. If you want to mix it up some more, throw in some lunges (side-to-side as well as front-to-back).
There are plenty of exercises you can do to hit the whole body without using weights or equipment. If you must have something, I would go for a pull-up bar.
For something as short as 10 minutes, just minimize your rest as much as possible.