By Shannon Willits, NPCP, FAFS
Most men train for strength. Few train for control. And almost none train their adductors — the inner thigh muscles that power lateral movement, protect the pelvis, and stabilize the core under load. That is a problem.
Whether the goal is sprinting, heavy lifting, or recovering from a third groin strain, there is one movement every male athlete and fitness enthusiast should have in his toolkit: the Copenhagen plank. It is not just a side plank variation. It is a clinically relevant, performance-driven exercise that addresses injury prevention, core integration, and athletic longevity in ways that conventional training routinely misses.
The Missing Link in Male Training
Joseph Pilates called it the “powerhouse” for a reason. The center of the body — the deep abdominals, pelvic floor, glutes, and inner thighs — is not simply where movement originates. It is where movement is controlled. When that foundation is underdeveloped or asymmetrical, every lift, sprint, and rotational demand pays the price.
Research and clinical observation consistently reveal the same pattern among male clients: a significant gap between superficial strength and deep stabilization capacity. That gap manifests as low back pain, chronic hip tightness, and recurring injury — particularly in the groin and adductor complex.
The Copenhagen plank addresses that gap directly.
What Is the Copenhagen Plank?
At first glance, it looks like a side plank variation. In functional movement terms, it is a full-body integrity test with concentrated demand on the adductors, obliques, and pelvic stabilizers.
The exercise requires elevating the top leg on a bench or box, supporting the body laterally while the inner thigh bears the primary load. The bottom leg hovers or makes light contact with the floor, introducing an additional stabilization challenge. In Pilates methodology, this is integrated strength — the body operating as a coordinated unit. Anti-rotation, cross-body control, and lateral line endurance. Athletic readiness.
Why Should Men Care?
Male athletes are disproportionately affected by groin injuries. Across football, hockey, soccer, and combat athletics, the adductor complex is repeatedly subjected to high-velocity loading, eccentric demand, and asymmetrical stress. The Copenhagen plank builds endurance and bilateral symmetry in this complex, with research supporting its role in reducing the risk of adductor strain and mitigating associated low back and hip dysfunction.
The benefits extend further than injury prevention. Pelvic alignment and cross-chain coordination are far more predictive of functional output than six-pack development — and the Copenhagen plank activates the obliques and deep stabilizers with a specificity that few exercises replicate.
Adductor strength also shapes how the body moves under load. The deadlift, squat, and kettlebell swing all demand a hip position that weak adductors cannot reliably sustain. Improved capacity here reduces shearing forces on the lumbar spine and improves force transfer through the kinetic chain.
What the exercise ultimately targets is the gap between strength and control — the distinction that separates resilient athletes from those who train hard but break down often.
How to Do It (Pilates Style)
Set Up: Begin in a side plank with the forearm on the mat. Elevate the top leg onto a bench or box, resting the shin or ankle on the edge. The bottom leg hovers or lightly contacts the floor.
Align: Find length before lift. Imagine a line of energy from the inner ankle to the ribcage — long, not compressed. Ribs draw in, shoulder packs down and back, glutes maintain low-level activation. This is not a position to muscle through. It is one to inhabit.
Hold and Breathe: Breathe laterally into the lower ribs to maintain intra-abdominal pressure without bracing rigidly or gripping through the neck. Begin with 10- to 20-second holds per side, prioritizing quality of position over duration.
Progress: Controlled lowering and lifting of the bottom leg introduces dynamic demand. Alternating holds develop coordination under fatigue. Advanced practitioners can pair the movement with reformer-based lateral work for integrated apparatus training.
A Note on Ego
The Copenhagen plank is one of the most reliably humbling exercises for men who consider themselves strong. Shaking within seconds is not a sign of weakness — it is the nervous system recruiting stabilizers that have gone chronically underloaded. That tremor is the body doing exactly what it is supposed to do.
Hold it anyway. The shake is where the work actually happens.
At threshold, the body initiates a remodeling process — fascial tissue integrates, neuromuscular pathways strengthen, and the gap between gross strength and true stability begins to close. This is the principle behind neurostrength training: the nervous system, not the muscle, is the final determinant of functional capacity.
What the exercise exposes is equally valuable. Compensation patterns, asymmetries, and stabilization deficits that years of conventional training can mask become immediately apparent. For coaches, that information alone is worth the exercise.
For any male athlete, coach, or clinician serious about bulletproofing the groin, unlocking stabilization capacity, and building strength that holds under real demand — this is not a supplementary movement. It is foundational infrastructure.
Shannon Willits, Master Pilates Educator
Shannon Willits is a Master Pilates Educator with more than 25 years of experience in functional movement, rehabilitation-informed training, and athletic performance. As the owner of seven growing Club Pilates studios in Lee County, Florida, she has become one of the region’s leading voices in Pilates education, mentoring and certifying aspiring instructors through comprehensive training programs rooted in movement science.
Shannon is STOTT Pilates certified, a Fellow of Applied Functional Science (FAFS), a Functional Golf Specialist, and a certified Gyrotonic® instructor. She is also an approved NPCP CEC Provider and the creator of the Pilates for Rotational Sports workshop, which blends performance training, injury prevention, and functional movement education for both athletes and instructors.