Actually for races, esp big scale races with very high participation rates, i really like and at the same time dont like the masses one.
1. Masses = fun, for sure. Atmosphere, can raise spirits up when the grinding gets tough.
2. Performance = did i tell you someone just suddenly stepped out in front of me at AHM 2023 without checking and he continued to slowly jog ie not overtaking smartly, so i had to jam brake at around 4:00 pace flat? IIRC at the Marina Barrage bridge after turning left, that asphalt area frequent runners and esp cyclists (rolling down mah) would know even that asphalt area is ever so slightly downhill one. Then just along BEG just before Sheares bridge i got ITBS pain liao, whether anything to do with the jam brake, i dont know.
^^^^^^
For road cycling, such very slow overtaking and not checking prior, also not really zai/steady and can piss off other fellow cyclists. For me, i do check before "venturing out", even over at MBS area which is not even dedicated cycling lane or on the road.
Ok itchy finger, go ask AI. Sometimes also dont know whether true or not, this google AI.

Everything like also Yes yes yes......basket.
AI Overview
Yes, sudden hard braking during running can absolutely trigger
Iliotibial Band Syndrome (ITBS), or cause a sudden flare-up of the condition. While ITBS is considered an overuse injury that usually develops over time, a sudden, high-intensity action like breaking sharply can cause immediate, acute irritation.
Torquay Sports Medicine Centre +3