Ever finish a workout wondering if you pushed hard enough? If you crave that next-level burn, try former SAS soldier Jason Fox’s 3-exercise finisher circuit—it’s made to empty your tank. Do 6 rounds with quick rests: 500m row, 24 burpee box jumps, 30 calories on the assault bike. Don’t let the short list fool you—it’s spicy, cranking your heart rate to burn every last bit of energy. Have you used a finisher circuit before? Would you dare take on this challenge next gym session? Let me know in the comments!