“Low impact” is one of the most frequently recommended exercise qualities for women over 50 – and one of the most misunderstood.
Most people interpret low impact as meaning easy, gentle, or safe for joints. In practice, it means something more specific: movements where at least one foot is in contact with the ground at all times, reducing the impact forces that occur when both feet leave the ground simultaneously, as in running or jumping.
Walking is low impact. Swimming is low impact. Strength training is low impact. High-impact means jumping, running, and plyometric movements where the body becomes fully airborne.
The distinction matters because “low impact” says nothing about training load – the variable that actually determines whether an exercise builds strength, maintains bone density, and develops the muscular support that joints need.
Low Impact Is Not the Same as Low Load
A walking program is low impact. It’s also too low in load to produce the adaptations that matter most for your joint health, independence, and fall prevention.
Walking is cardiovascular exercise. It maintains a baseline of mobility and general health. What it doesn’t do is provide a sufficient load stimulus to build the quadriceps, glutes, and hip musculature that stabilize the knee, protect the hip, and give you the reserve of strength that daily life draws from.
The same applies to most “low impact” exercise classes built around light resistance, high repetitions, and continuous movement. These feel like effort – they elevate heart rate, produce fatigue, and generate some soreness. The load on any individual muscle group is low enough that the adaptation signal is minimal.
Low impact with sufficient load is what produces the changes you’re looking for. Strength training fits that description. Most “low impact” exercise classes do not.
→ Strength Training with Joint Pain After 50
What Sufficient Load Actually Means
Progressive overload is the principle that drives strength adaptation: over time, the demand placed on the tissue must increase for the tissue to continue adapting. This doesn’t require heavy lifting in the way most people imagine. It requires load that challenges the muscle meaningfully – where the final few repetitions of a set require genuine effort – and load that increases gradually as the tissue gets stronger.
For women returning to training or managing joint pain, “sufficient load” might be:
- A squat to a box with 10–15 pounds of added resistance
- A Romanian deadlift with moderate dumbbells
- A seated row at a resistance that makes the last three reps genuinely difficult
None of these require high impact. All of them provide a load stimulus that walking and typical low-impact classes don’t approach.
The Exception: Bone Density
There is one domain where impact specifically matters: bone density.
Bones respond to impact – the mechanical stress of ground reaction forces during weight-bearing activity. Running, jumping, and stair climbing produce higher bone loading than walking or swimming. Estrogen’s protective effect on bone declines after menopause. Some higher-impact loading can contribute to maintaining bone density during this period.
However, the muscles and tendons that support bones during impact need to be strong enough to handle that impact safely. Progressive strength training builds that foundation first. Impact activities are appropriate once the supporting musculature is prepared for them.
A Practical Summary
Low impact is a useful quality in your exercise – particularly for managing joint flares, early return to training, and general daily activity. The mistake is treating it as the primary goal rather than a characteristic of how you train.
The primary goal is progressive load. The question to ask of any exercise program is not “is this low impact?” but “is this providing sufficient load to drive adaptation?” That answer matters more than the impact classification.
Strength training is low impact and high load. Two sessions per week, built around foundational movement patterns with progressive increases in resistance, covers both requirements.
→ How to Get Back to Exercise After a Long Break
The free 1-week trial at 29 Again Custom Fitness is the place to start if you’re in the Timonium area and want a program that combines the joint safety of low-impact exercise with the load that actually produces results.
– Stephen Holt, CSCS
29 Again Custom Fitness | Timonium, MD
Nerd Note: Progressive resistance training produces meaningful improvements in muscle strength, functional performance, and bone mineral density in older adults. Liu CJ & Latham NK, Cochrane Database Syst Rev (2009); Layne JE & Nelson ME, Med Sci Sports Exerc (1999).
