Crunch and Squat Sync
Quick Intro
Crunch and Squat Sync pairs two different exercises done side by side at the same time. One partner curls the spine from lying flat to sitting upright, a full sit-up, while the other lowers into a squat and drives back up. Each of you works a different part of your body here, the sit-up partner’s core and the squat partner’s legs and glutes, and you each keep your own exercise the whole time, no swapping. Both partners pace their reps to finish together, then meet for a high-five.
For the full technique behind each half, see Sit-up and Bodyweight Squat.
What You’ll Need
No equipment for either exercise.
How to Do It Together
Partner on sit-ups. Lying on the back, knees bent, feet flat. Work toward an agreed rep target, pacing yourself to finish around the same time as your partner’s squats.
Partner on squats. Standing, feet shoulder-width apart. Work toward the same agreed rep target, pacing yourself to finish around the same time as your partner’s sit-ups.
Meet at the finish. Once you’ve both completed your reps, come together for a high-five.
Breathing follows each exercise’s own pattern and doesn’t need to match between you: exhale on the way up and inhale on the way down for the sit-up, inhale on the way down and exhale on the way up for the squat.
Why the Pace Match Matters More Than the Exercise Itself
Getting two different movements to land on the same finish is the entire coordination challenge here, since the exercises themselves don’t need to match in any other way. The realistic target is landing within a few seconds of each other, not a perfectly matched stopwatch finish, so neither of you needs to count the other’s reps to make this work.
This pairing is also a deliberately low-key one. A high-five is a light touch, and this is a good first exposure to doing two different exercises at once before trying a pairing built around one partner holding while the other works, since here each of you only has to manage your own pace, not hand anything off to the other person partway through.
Nothing stops you from repeating the paired sets for more than one round. Fatigue builds unevenly between a sit-up and a squat, so the gap that synced up cleanly in round one might need a small adjustment by round three. Resyncing the finish fresh each round keeps the whole thing working past the first set.
If You’re at Different Fitness Levels
Both still building up rep counts. Use smaller rep targets on both sides. The same synced-finish idea still applies, just at a lower number.
One partner stronger than the other. Set each partner’s own rep target based on their own typical pace at their own exercise, calibrated so you still finish within a few seconds of each other despite the different fitness levels.
Safety and Consent
Standard sit-up and squat form cautions apply independently to each partner, covered in full in Sit-up and Bodyweight Squat.
Every connection moment in these exercises is something either partner can skip or scale back at any point, including this one, no explanation needed. End the set quietly with no high-five if that suits the mood better.
FAQ
Does it matter who finishes first? Not really, since the goal is landing close together, not racing. A few seconds apart either way still counts as a synced finish.
Can we use different exercises than sit-ups and squats? This pairing is specifically sit-ups and squats, but the same paced-finish idea works for other exercise pairs too.
Do we ever swap which exercise each of us does? Not within one round. Each partner keeps their own exercise for the full set; swap who does which exercise next time you repeat it, if you want variety.
Do we need to do the same number of reps? No. A sit-up and a squat don’t take the same amount of time per rep, so the actual rep counts can differ. What matters is landing on the same finish, not matching the numbers.
Can we do more than one round? Yes. Repeat the paired sets as many times as you want. Just resync the finish each round, since how closely your paces matched the first time doesn’t guarantee they’ll still match by the third.
How should each of us breathe? Each of you follows the breathing for your own exercise. Exhale as you curl up in the sit-up and as you rise from the squat, and inhale on the way back down. Nothing needs to match between the two of you.
Can we do the sit-ups and squats separately instead of pairing them? Yes. Sit-up and Bodyweight Squat both work fine on their own, with no pairing attached.
Built on Sit-up and Bodyweight Squat. Squat-to-Kiss and Wall Sit Hold & Squat Work both build on the same squat used here, paired with a kiss and a held wall sit respectively.