4. You’ve barely broken a sweat.
If you didn’t perspire a drop during your entire workout, even if you were outside in cold weather, then you probably could have revved it up more.
“Although some people sweat more than others, you should have some visible sweat, which indicates you’ve worked hard,” says Kayla Itsines, a personal trainer who started the Bikini Body Confidence online workouts.
The solution: Don't work so hard that you risk getting injured, but pick up the pace or intensity so that your sweat-wicking clothes have something to wick.
5. You don’t feel like you’ve done anything.
Be honest with yourself. It’s OK to adjust for your skill level or scale back when something feels too tough, but you don’t want to completely let yourself off the hook.
After a too-easy workout, "you might walk away feeling disappointed and less motivated," Itsines says.
The solution: You’ll know you’re exercising at the correct intensity if your workouts feel challenging, but not so hard that you can’t complete them. By the end, you should be feeling good.