A new brain clinic has opened in London, which uses non-invasive brain stimulation to treat chronic pain, anxiety and burnout at the neurological source.

Tonal, the at-home strength-training startup backed by Amazon and athletes such as Serena Williams, Maria Sharapova and Mike Tyson, has announced a restructuring, reducing its workforce by 35 per cent as part of a move to sustainable growth and profit.

Tennis superstar Serena Williams and Olympic champion Usain Bolt have joined a team of high profile investors backing sports startup Let's Do This.