Build your core stability in under five minutes • High plank for 20 seconds to fire up your deep core • Low plank for 20 seconds to challenge your bracing strength • Side plank for 20 seconds each side to train lateral stability and protect your low back • Reverse tabletop for 20 seconds to activate your posterior chain • Reverse plank for 20 seconds to strengthen your glutes, hamstrings, and shoulders • Downward facing dog for 20 seconds to lengthen the posterior chain and reinforce shoulder st