Often overlooked, isometric training can help build both size and strength by holding positions where a muscle is under high tension, often in a lengthened position. Research has even shown that isometric holds can be just as effective as full range of motion reps for building muscle.
With leg muscles such as the quads, glutes and hamstrings among the largest in the body, your lower half stands to gain plenty from incorporating isometrics into your routine. And if it’s good enough for six-time Mr Olympia Chris Bumstead, it’s probably worth your attention.
Now retired from professional bodybuilding, Bumstead is focusing on addressing issues he previously didn’t have time to prioritise. That means placing greater emphasis on movement patterns that improve joint health, not just chasing mass.
He recently devised a leg workout built largely around isometric holds. ‘This is like a semi-isometric workout,’ he says in his latest YouTube video. ‘A lot of it is still helping my body prepare to feel good, fixing some injuries and strengthening something that I didn’t always have.’
Why Isometrics Work
A review published in The Scandinavian Journal of Medicine & Science in Sports concluded that isometric training can lead to ‘substantial improvements’ in muscular hypertrophy and strength.
‘Isometrics don’t just stimulate muscle growth,’ MH fitness director Andrew Tracey says, ‘they can also help to build strength through improved neural drive; by pushing a muscle to a maximum effort against a load you can’t possibly move you can train your body to improve motor unit firing rates – a science-y way of saying you’re teaching your body to fire up more muscle when you’re lifting weights, leading to increases in strength.
‘Isometrics are also often incorporated in rehab programmes as a safe way to expose torn muscles to load, helping to speed up tendon recovery. If you’re working around injuries or niggles, isometrics are a great (and safe option) for still keeping your training up, and have also been show to provide short term pain relief to certain injured body parts, such as the knees.’
Chris Bumstead’s Isometric-Focused Leg DayA1. Hip Thrust
A2. Dumbbell Step-DownB1. Romanian Deadlift
B2. Long Lever Hip Plank
Rather than loading up a barbell and holding the bottom of a squat, Bumstead’s session centres around hip thrusts, dumbbell step downs, Romanian deadlifts and what he calls ‘long lever hip planks’ – one foot elevated on a bench, the other leg raised, forearms on the floor.
For the hip thrusts and step-downs, he performs an isometric hold on the first rep in the shortened position, then completes 8–15 reps as normal.
‘It’s kind of humbling holding a 15-pound dumbbell, but this shit hits different parts of your quads that you’re normally not used to feeling, and it’s very [important for] stability and knee health,’ he says of the step-downs. ‘Preventing your knee from collapsing in is a huge thing for knee health.’
Using a snatch grip for the Romanian deadlifts, Bumstead adds three isometric pauses per rep: lowering one third of the way and holding for five seconds, lowering another third and holding for five, then reaching full range and holding again before returning to the start. Three to five reps are enough due to the extended time under tension.
The long lever hip plank raises the difficulty of a standard plank. Bumstead aims for 30-second holds, keeping his core braced and his elevated leg fully straight to increase tension through the hip flexor.
‘The goal, similar to when I doing the hip thrust, is keeping my hips tucked forward, because sometimes people do a hip flexor plank with their knee bent on a box,’ he adds. ‘But you’re not even stretching the full hip flexor to activate it in the lengthened position. So I’m trying to straighten my leg, put my hip forward a little bit and tuck my ribs. I’m more of a sit-all-day-and-squat type of bodybuilder, so my hip flexors and groin stabilisers are pretty weak.’
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