Lying Leg Extensions
How to do it: Lie on your stomach. Rest your head on your forearms with your chin down. Pull your abdominal muscles up and in. Inhale and raise your right leg off the mat. Point your toes and squeeze your glutes. Press your hips bones into the floor. Hold for 2 seconds, then exhale as you lower and repeat on the other side. Repeat 3-5 times per side for 3 sets.
Pro tip: Focus on lengthening the leg you are extending to get that thigh off the floor.
Swimming
How to do it: Lie on your stomach with your legs straight behind you. Extend your arms overhead. Lift your belly button off the floor, then lift your arms and legs off the floor. Slightly flutter your arms and legs as you extend through all of your limbs. Breathe in for 5 flutters, then breathe out for 5 flutters. Continue this for 3-5 complete breaths. Aim for 3 sets.
Pro tips: This is another exercise where you want to avoid overstraining the neck. Look at a point on the floor. Protect your lower back by pressing your tailbone toward the floor. And be careful not to hunch your shoulders to your ears. The moment you lose your alignment, take a break then continue where you left off.