Why Bone Density and Strength Training Matter More Than You Think—Especially After 35 and on GLP‑1s

When we talk about health goals, weight loss, energy, and aesthetics often dominate the conversation. But there’s a quieter, foundational aspect of health that deserves far more attention: bone density. For women over 35 and for people using GLP‑1 medications, maintaining strong bones isn’t just important—it’s essential for long-term wellbeing.

The Silent Shift After 35

From our mid‑30s onward, bone density naturally begins to decline. For women, this process accelerates with hormonal changes during perimenopause and menopause, particularly as oestrogen levels fall. The challenge is that bone loss is largely invisible—you don’t feel weaker bones until a fracture occurs.

Loss of bone density increases the risk of osteoporosis, stress fractures, joint pain, and reduced mobility later in life. The good news? Bone is living tissue, and with the right stimulus, it can remain strong and resilient well into later years.

GLP‑1s and Bone Health: What to Be Aware Of

GLP‑1 medications (such as semaglutide and tirzepatide) are proving life‑changing for many people, supporting weight loss and metabolic health. However, rapid weight loss—particularly when paired with low protein intake and minimal resistance training—can increase the risk of lean mass and bone loss.

Body weight itself places mechanical load on the skeleton. When weight drops quickly, that stimulus decreases. Without replacing it through strength and impact training, bones may weaken over time. This doesn’t mean GLP‑1s are harmful to bone health—but it does mean bone support must be intentional.

Why Strength Training Is Non‑Negotiable

Strength training is one of the most effective tools we have for protecting and improving bone density. When muscles pull against bones under load, it sends a powerful signal for bones to adapt and strengthen.

Key benefits include:

• Increased bone mineral density, especially in the hips and spine

• Improved balance and coordination, reducing fall risk

• Preservation of muscle mass during weight loss

• Better joint stability and posture

For women over 35 and people on GLP‑1s, strength training isn’t about lifting the heaviest weights possible—it’s about consistent, progressive resistance that challenges the body safely.

What Kind of Training Supports Bone Health?

The most bone‑beneficial workouts include:

• Resistance training: Squats, deadlifts, lunges, presses, rows, and loaded carries

• Weight‑bearing movement: Walking, hiking, stair climbing

• Impact or power work (where appropriate): Hopping, jumping, or light plyometrics—particularly helpful for hip and spine density

• Progressive overload: Gradually increasing resistance over time

Two to four strength sessions per week can make a significant difference, especially when started early and maintained long term.

Nutrition Still Matters—A Lot

Training alone isn’t enough. Bones require adequate nutrition to adapt and stay strong. Key considerations include:

• Protein: Essential for muscle and bone tissue, particularly important during weight loss

• Calcium: Supports bone structure

• Vitamin D: Crucial for calcium absorption

• Overall energy intake: Chronic under‑eating increases bone loss risk

People on GLP‑1s may need to be especially mindful, as appetite suppression can make it harder to meet nutritional needs without planning.

Playing the Long Game

Strong bones are a long‑term investment. The habits you build in your 30s, 40s, and 50s profoundly influence how you move, train, and live decades later. Strength training isn’t just about aesthetics or short‑term results—it’s about independence, confidence, and resilience.

Whether you’re navigating hormonal changes, pursuing fat loss with GLP‑1 support, or simply want to age well, prioritising bone density through strength training is one of the smartest health decisions you can make.

Your future body will thank you for it.