The clamshell: a classic glute activator, but only if done right. It’s not about how *high* you lift your knee, it’s about staying stacked and controlling the movement. Useful for: ✅ Low back pain ✅ Hip & knee pain ✅ Prepping for walking, running, or summer outdoor activities like gardening Form tips: 1. Keep hips stacked - don’t roll back 2. Heels stay together 3. Control the lift and slowly lower 4. You should feel it deep in the side glute, not the front of your hip or low back I use this one

Samsung to Launch 'Clamshell' Foldable Phone in February 2020

Nubia Flip clamshell smartphone debuts in China with 6.9" FHD 120Hz display, Snapdragon 7 Gen 1 & $415 price tag - Gizmochina

Foldable iPhone to Feature a Clamshell Design, Cost Less Than Competing Devices, but May Arrive Much Later in the Market