Fig 2 -

Internal intensity during resistance exercise protocols, represented as (A) mean rate of oxygen consumption (), (B) mean heart rate, (C) blood lactate concentration, and (D) session rating of perceived exertion (RPE). Mean and 95% confidence intervals shown. a = different to 3x1060s, b = different to 3x10180s, c = different to 8x3120s, d = different to 8x3300s, e = increased from baseline. Note: Some data points are missing at random due to equipment or collection errors; individual data reported for transparency.