Does The Second Sprint Have To Get Weaker After An All-Out First One?

Did you know? 👀  Japanese labs measured this in 2024. 15 young men did two 30-second all-out sprints.  Four easy minutes sat between those efforts.  One break added 𝑬𝑴𝑺 to light pedalling.  The other used matched easy cycling only.  That easy load was 𝟒𝟑.𝟔 watts. Mean 𝒍𝒂𝒄𝒕𝒂𝒕𝒆 hit 𝟏𝟕.𝟒 with 𝑬𝑴𝑺.  It hit 𝟏𝟔.𝟐 without it.  Peak 𝒍𝒂𝒄𝒕𝒂𝒕𝒆 was 𝟏𝟖.𝟕 versus 𝟏𝟕.𝟒.  Sprint 𝒑𝒐𝒘𝒆𝒓 did not fall.  Peak power stayed the same.  Mean power stayed the same.  Fatigue did not rise. 𝒍𝒂𝒄𝒕𝒂𝒕𝒆 is a signal in the blood.  Hard efforts make it.  It can tell muscle to build more engine.  That engine helps the body use oxygen later. 🫁 This test did not time a running race.  It did not prove a faster 5K.  It did not prove longer easy runs.  It showed extra signal.  The second sprint still held. ⚡  For runners, that means interval quality can stay high. Led by 𝑫𝒓 𝑹𝒚𝒐𝒔𝒖𝒌𝒆 𝑻𝒂𝒌𝒆𝒅𝒂.  Lab: 𝑪𝒉𝒖𝒌𝒚𝒐 𝑼𝒏𝒊𝒗𝒆𝒓𝒔𝒊𝒕𝒚, Japan.  𝑲𝒚𝒐𝒕𝒐 𝑼𝒏𝒊𝒗𝒆𝒓𝒔𝒊𝒕𝒚 also took part.  Published by 𝑻𝒉𝒊𝒆𝒎𝒆, Germany.  Journal: 𝑰𝒏𝒕𝒆𝒓𝒏𝒂𝒕𝒊𝒐𝒏𝒂𝒍 𝑱𝒐𝒖𝒓𝒏𝒂𝒍 𝒐𝒇 𝑺𝒑𝒐𝒓𝒕𝒔 𝑴𝒆𝒅𝒊𝒄𝒊𝒏𝒆. Full post, podcast, original paper, more 𝑬𝑴𝑺 sport studies 👇 https://bit.ly/4gPrJQt