Body skin laxity: causes and solutions to firm the skin

Dielika BA

· STARVAC · Expert advice

· Published on

April 21, 2026

In brief

Body skin laxity is a gradual loss of firmness and elasticity, common on the stomach, arms, thighs and inner knees. It is linked to ageing, weight changes, pregnancy and lifestyle. Physical activity, hydration and regular firming treatments such as Stretching Cellulaire® help restore toned-looking skin.

Understanding body skin laxity

Skin laxity is a loss of firmness and tone in the skin. The skin looks less taut, less dense and sometimes softer to the touch. This change can appear gradually with age, after weight loss, a pregnancy or a change in lifestyle.

The skin is naturally supported by fibres such as collagen and elastin. They contribute to its firmness, suppleness and hold. When their quality declines, the skin can lose tension and look slacker.

Skin laxity can affect several areas of the body: the stomach, arms, thighs, buttocks, knees or inner thighs.

What are the signs of skin laxity?

Skin laxity does not always show in the same way. It can be slight at first and become more visible over time.

The most common signs are:

Skin that feels less firm to the touch
Loss of tone
Skin that looks softer or less taut
Slackness on the stomach
Less defined arms
Less firm thighs or buttocks
Less dense skin after weight loss
A feeling of lack of support

These signs can vary with age, skin quality, lifestyle, physical activity and weight changes.

Why does the skin on the body become slack?

Several factors can contribute to skin laxity. Natural ageing plays an important role, but it is not the only cause.

1. Loss of collagen

Over time, collagen production decreases. The skin then gradually loses density, firmness and elasticity. This is one of the main causes of skin laxity.

2. Weight changes

Significant weight gain or loss can stretch the skin. When the tissues do not fully regain their tone, a slack appearance can develop, especially on the stomach, arms or thighs.

3. Pregnancy

After a pregnancy, the skin on the stomach may lack firmness. This change is natural and depends on several factors: skin elasticity, weight gain, age, hydration and overall recovery.

4. Lack of physical activity

Exercise helps maintain muscle tone. When muscles are used less, some areas can look less firm. Strength training can therefore visibly support body firmness.

5. Lifestyle

Lack of sleep, dehydration, smoking, excessive sun exposure or an unbalanced diet can affect skin quality and accentuate skin laxity.

How can you firm the skin naturally?

To support skin firmness, the ideal is a holistic approach. Hydration, a balanced diet, strength training and regular care can help improve the appearance of the skin.

Massages, draining treatments, firming protocols and professional technologies can also support tissue stimulation and give certain areas a more toned appearance.

“Skin laxity is not only treated on the surface. Skin quality, firmness, tissue stimulation and overall tone all need support.”
STARVAC partner professional

Key takeaways

Skin laxity is a gradual loss of firmness, tone and elasticity in the skin.
It can be linked to ageing, weight changes, pregnancy, lack of exercise or loss of collagen.
Commonly affected areas are the stomach, arms, thighs, buttocks, knees and inner thighs.
Physical activity, hydration, diet and firming treatments can help improve skin quality.
Professional body technologies support firmness, body contouring and a more toned appearance of the skin.

Which professional solutions firm the skin?

Professional treatments go further than a home routine. They can support tissue stimulation, firmness, drainage and body contouring.

At STARVAC, our body technologies are designed to work on tissue quality, support the figure and help professionals offer targeted, natural and non-invasive treatments.

Depending on needs, protocols can focus on firmness, drainage, body contouring, cellulite or recovery.

Conclusion

Skin laxity is a natural change, but it can be supported with good lifestyle habits, regular physical activity, suitable care and professional technologies.

With its solutions for body and face, STARVAC supports professionals with premium protocols dedicated to firmness, skin quality, drainage, the figure and overall well-being.

The goal: to offer treatments that are more targeted, more sensory and better suited to clients' expectations today.

Frequently asked questions

Which areas of the body lose the most firmness?

The stomach, inner arms, inner thighs, buttocks and the area above the knees are the most commonly affected.

Can you firm the skin without surgery?

Yes. As part of a regular programme, mechanical, non-invasive treatments such as Stretching Cellulaire® visibly improve skin firmness and tone.

How long before the skin looks firmer?

The first effects on the appearance of the skin usually appear after a few sessions. A full programme, followed by maintenance sessions, helps prolong the results.