Sorry no, I’m not telling people not to lift weights. I’m simply stating that activities which surge dopamine in our brains adversely affects our fluency afterwards. Lifting weights is obviously healthy for the body, but when it comes to improving fluency for the day ahead, it’s recommended to abstain from dopamine surging activities. Low intensity exercise doesn’t keep dopamine surged for hours in the brain afterwards like lifting weights does, so your speech fluency may be adversely affected for longer if you do high intensity exercises, even HIIT exercises.