Aqua lungs: how Rod Stewart’s underwater swimming may help his singing

Singer trains underwater like Frank Sinatra once did and scientists say it may be useful in maintaining vocal prowess

Electrolyte sachets are everywhere – but will they cure a festival hangover?

Marketed to ‘party people’ and touted as a faster route to hydration than water, electrolytes are in the middle of a boom

‘Now I do weight training’: how exercise helped one patient stay free of cancer

Margaret Tubridy, 69, took part in landmark study that reveals the role of exercise in preventing return of disease

Walk on the wild side: Gillian Anderson and Jason Isaacs on their epic hiking movie The Salt Path

Raynor Winn’s bestselling memoir about her and her husband’s 630-mile trek around England’s south coast has become a film. Its stars, makers and Winn talk floods, fog and forgiveness

The Salt Path review – Gillian Anderson and Jason Isaacs hike from ruin to renewal

Marianne Elliott directs this affecting drama, based on Raynor Winn’s memoir, which builds steadily as the couple journey towards redemption

The North review – old friends’ trek through the Highlands might be the ultimate hiking film

Patiently following the progress of two pals’ reunion across Scotland, director Bart Schrijver achieves a majestic drama that never forces its epiphanies

Baby food pouch hysteria? It’s just another way of making mothers feel guilty

We need a society that supports parents and makes good food choices achievable – not more lecturing of exhausted mums, says Guardian columnist Rhiannon Lucy Cosslett

UK among lowest-ranked countries for ‘human flourishing’ in wellbeing study

Findings of survey on happiness, health, finances, meaning in life and relationships raise concerns for young people

Leading baby food brands making high-sugar meals, study finds

Food from brands such as Ella’s Kitchen and Heinz are often nutritionally poor, researchers say

Teenagers who go to bed early and sleep longer have sharper brains, study finds

Researchers surprised at impact that even small differences in sleep make to adolescents’ cognitive abilities