No-Rest Workout

Crush this quickie like a boss.
Some things in life are better without breaks: Netflix binges, flights, your workout. Especially your workout.
Which is exactly why we love complexes: a series of exercises seamlessly strung together using the same pair of weights, so you can flow from one move to the next without pausing for, well, anything. (As in: no fixing your ponytail three times or shuffling through half your playlist.) Keeping the weights in your hands the whole time eliminates your ability to lollygag, so your body never catches a real break, You're able to keep your heart rate up as you fully fatigue one muscle group after the next, which amps the cardio factor and adds up to a serious muscular and endurance challenge for your entire body.
And let's not forget the flat-abs bonus: As you tire, you have to fight even harder to maintain proper form, especially a tight core.
Two or three times a week, complete these exercises in order using eight-or 10-pound weights, moving from one to the next without rest. Perform four rounds total, aiming to minimize (or better yet, skip) your rest time between rounds.