Son says he feels physically empty and is so sorry to have let down my team-mates.
Tiger Woods cited a lack of physical preparation after a demanding comeback from injury.
In a recent interview, Luka Modrić spoke about how fatigued he was after Croatia's successful World Cup campaign.
Being under stress, suffering from ADHD, anxiety or depression can be some of the reasons why we keep putting off doing simple tasks.
Supplements created for enhancing metabolism, promoting energy, easing adrenal fatigue, or providing adrenal support often contain thyroid hormones and steroids that may cause dangerous side effects.
The drug causes severe fatigue and weakness but is rarely used by addicts.
Health DG Dr Noor Hisham Abdullah tells people to seek immediate treatment if they fall ill upon consuming any food or drink.
Lin See-Yan says the country is facing high debts, a weak currency and dependency on cheap foreign labour.