Costco (in Canada at least) has these sweet rubber mats that remind me of the gym. Way cheaper than Amazon since they are heavy as heck! It's flat on the other side :
Can You Install Rubber Gym Flooring Over Carpet? - Flooring Inc
Survivor SportFloor Isometric Grey 48 in. x 180 in. x 0.3 in. Rubber Gym/Weight Room Flooring Rolls (60 sq. ft.) 01050805082 - The Home Depot
Regupol Aktiv Flooring - Custom Gym Surfaces | Rogue Fitness
Can You Install Rubber Gym Flooring Over Carpet? - Flooring Inc
10 Best Home Gym Floors Rubber Flooring for Indoor Fitness
Rubber Mats | Calgary | Goliath Products
GXMMAT Extra Large Exercise Mat 10'x6'x7mm, Ultra Durable Workout Mats for Home Gym Flooring, Shoe-Friendly Non-Slip Cardio Mat for MMA, Plyo, Jump, All-Purpose Fitness Black Real, Exercise Mats - Amazon Canada
10 Best Home Gym Floors Rubber Flooring for Indoor Fitness
CAP 24 in. x 24 in. x 3/4 in. Extra Thick Interlocking Puzzle Exercise Mat for Home and Gym Equipment (24 sq. ft.) MT-2206AM@HD1 - The Home Depot
Gym Mats are Exercise Room Mats by American Floor Mats
Best Gym Floor Over Carpet for Home - StayLock Tiles
Home Gym Floor Mats - Exercise Room Flooring
Best Gym Floor Over Carpet for Home - StayLock Tiles
Cork Flooring Multitalented Enough As Gym Flooring - ICork Floor
Ak Floor Carpet Exercise Mat Canada Market Sand Surface Slip Resistance Strong Shock Absorption Outdoor PVC for Volleyball Tennis Badminton Sport Court - China School Flooring, Education Flooring | Made-in-China.com