Why It Matters After 40 (The Science)

As we age, our training needs to reflect reality, not ego.

• After 30, we lose 3–8% of muscle mass per decade (sarcopenia). Resistance training slows and reverses this.

• Bone density decreases, especially in post-menopausal women. Fluid resistance stimulates osteogenesis (bone growth) without the heavy joint loading.

• Proprioception—the body’s ability to sense position—declines, increasing fall risk. Unstable loads, such as water, force the body to stabilize and enhance neuromuscular coordination.

• Functional instability training enhances joint integrity and activates deep stabilizers, such as the transverse abdominis and glute medius—muscles that prevent injury and improve posture.

• The shifting mass inside the Surge mimics unpredictable external loads, which activate reactive core engagement and stimulate the vestibular system, important for balance and spatial awareness.

Water-based resistance provides all of this—without heavy loading. It’s scalable, safe, and seriously effective.

At Burn with Kearns, we use DVRT and Surge-style training not only for athletes but for real people who want to move well for life.

This is strength that flows, adapts, and endures.