09/02/2026
It’s about mechanical loading. Bone responds to stress. When we create enough force through the skeleton, we stimulate bone remodeling and help support bone density. Walking is great for overall health, but it typically creates about 1–1.5× body weight in ground reaction forces. Running increases that to approximately 2–3× body weight. Higher-impact activities can create even greater forces, which is one reason jumping and hopping exercises are often included in exercise programs designed to improve or maintain bone density. Examples of ground reaction forces during different activities can include: • Walking ≈ 1–1.5× body weight • Running ≈ 2–3× body weight • Drop jump from an 8-inch step ≈ 4× body weight • Reactive/rebound hop after landing ≈ 5× body weight That doesn’t mean everyone should immediately start doing box jumps. Bone adapts progressively. If impact feels intimidating, start with: • Heel drops • Jump rope • Skipping • Squat jumps • Rebounder work • Jump board on the reformer The goal is progressive loading, and what that looks like should be relative to YOU, your current bone health, strength, balance, exercise history, and fracture risk. And this becomes especially important in midlife. Menopause changes bone, tendon, muscle, and connective tissue physiology. Walking is fantastic, but walking alone may not provide the type or magnitude of loading needed to optimally stimulate bone. We need resistance training. We need progressive loading. And, when appropriate, we need impact. PMID: 29691816 PMID: 30904565 PMID: 15940371 PMID: 19826264