Get ready to hold your breath and prepare for the rush. Underwater Tunnels challenges Mudders to repeatedly plunge under a series of barrels dispersed throughout a cold body of water. Submerge, emerge, repeat is the name of this game.
Fill your bathtub with cold water. Lower yourself into the icy tub and submerge your head for 10 seconds. Come up for 5 seconds, then submerge again for 10 seconds. Repeat 10 times.
Swimming – Swim 50 yards at medium pace. Rest 90 seconds and repeat 4 times.
Jump Rope – Perform 100 singles or 50 doubles. Rest for 1 minute. Perform 4 rounds.
Thrusters- Complete 15 reps. Rest for 3 minutes. Repeat 3 times.
Tough Mudder Tips
Take a deep breath, duck under the barrels and surface on the other side. Repeat. Tough Mudder suggests using the buddy system. Pick a partner to help guide you through the obstacle.