no need to even buy anything. youtube and reddit have great strength training learning materials freely accessible. r/bodyweightfitness on reddit is a great place to start without even needing a gym membership
im going to have to disagree here. ive trained my google play by hitting the like button on songs i like. My music taste is wide ranging but often quite selective within a genre and its really blown me away with how good its been with providing me with subtley new music i.e just similar enough to interest me but different enough that i dont get bored. This also feeds into my weekly 'new music that i might like' menu. I really dont get suggested anything thats in the charts anymore much to my pleasure!
rugby has recently introduced a rule whereby there is a pitch-side doctor who will investigate replays of collisions where a concussion is suspected to have occurred. players are then removed from play for a mandatory 10 minute risk assessment which, if failed, means they cant return to play. quite a sensible move which should definitely be explored further and removes some of the burden of being a tough guy and playing through it