Fitness & Nutrition News: Week 41 of 2026
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This week: creatine and muscle mass in middle-aged adults, one weekly strength session against sarcopenia, diet drinks and weight loss, and a large analysis of calcium and vitamin D.
A week full of science that's useful day to day: creatine, strength training as we age, diet drinks, and supplements that may do less than we think. We summarize it with caution, because several of the studies are preliminary or were done in animals.
Muscle and training
Creatine may increase muscle in middle-aged adults even without training
A 12-week study found that creatine helped middle-aged adults gain muscle and strength without a structured exercise program. Combined with training and a calorie-restricted diet, strength gains were greater, with more lean mass and less fat. It reinforces creatine's role in maintaining muscle with age, although training remains the foundation.
Source: ScienceDaily — Fitness
If you want to try it, the usual dose is 3-5 g per day with no loading phase. This is the creatine monohydrate from our catalog:
Just one strength session a week can already make a difference with age
Age-related muscle loss (sarcopenia) makes everyday tasks harder and raises the risk of falls and fractures. The review notes that squats, weights, resistance bands or bodyweight exercises help maintain or regain strength, and that even one session a week brings benefits. Good news if you're short on time: starting small is better than not starting.
Source: ScienceDaily — Fitness
To train at home without a big investment, a set of bands with handles and a door anchor covers almost the whole body:
Leucine may help cells produce more energy, not just build muscle
A study describes how this essential amino acid protects key mitochondrial proteins from degrading, which increases cellular energy production. It's a basic-science finding that links nutrition and metabolism. For now it doesn't change how you should eat, but it helps explain why protein matters beyond muscle.
Source: ScienceDaily — Fitness
Nutrition and supplements
Diet drinks worked as well as water for weight loss in a two-year trial
A randomized trial of 493 adults with overweight or obesity compared sodas sweetened with aspartame, acesulfame K or sucralose against water. Both groups lost a similar amount of weight and improved waist circumference, body composition and several metabolic markers. It suggests that swapping a sugary soda for a diet one may help during a calorie deficit, although water remains the basic choice.
Source: ScienceDaily — Nutrition
Calcium and vitamin D barely reduce fractures and falls in older adults, large review finds
The analysis, covering more than 153,000 adults, concludes that these supplements, alone or combined, do little to prevent fractures or falls in most older people. The authors point to alternatives such as balance and strength exercise. Talk to your doctor before stopping any prescribed supplement.
Source: ScienceDaily — Nutrition
Following the MIND diet more closely is linked to a more slowly aging brain
People who adhered more closely to the MIND diet showed less loss of brain volume and gray matter, with differences equivalent to about 2.5 years of delayed brain aging. Berries and chicken were associated with more favorable changes; sweets and fast-food fried items, with more tissue loss. This is an observational study: it shows association, not causation.
Source: ScienceDaily — Nutrition
Sugar during antibiotic treatment may worsen gut microbiome damage
A study links eating more sugar while taking antibiotics with greater disruption of the gut microbiome and more growth of potentially harmful bacteria. The researchers suggest cutting back on sweets during and after treatment, but clinical trials are still needed to confirm it.
Source: ScienceDaily — Nutrition
Gear related to this week's news
Gear related to this week's news
Great value for money. Creatine monohydrate is the most studied supplement in fitness: it improves performance in short, explosive efforts and supports muscle growth over time. Standard dose 3-5 g/day, no loading phase needed.
- Price
- Quality
- Quantity
Set of 5 resistance bands from 10 to 50 lb each (up to 150 lb combined), with handles, a door anchor and ankle straps. A good-value option to train strength, glutes and mobility at home or while travelling, without barbells or dumbbells.
- 5 resistance levels (10-50 lb each, up to 150 lb combined)
- Handles, door anchor, ankle straps and bag included
- A good kit to train at home or while travelling without barbells or dumbbells
- Maximum resistance falls short for experienced gym-goers
Very handy for working different muscles at home. Low-impact exercises that suit controlled training.
- Several levels
- Price
- Easy to use
Good value for estimating your body composition
- Connectivity
- App
- Accuracy
- Entry-level range
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