Does Higher Intensity Increase the Rate of Responders to Endurance Training When Total Energy Expenditure Remains Constant? A Randomized Controlled Trial

Reuter, Marcel; Rosenberger, Friederike; Barz, Andreas; Venhorst, Andreas; Blanz, Laura; Hecksteden, Anne; Meyer, Tim

doi:10.1186/s40798-023-00579-3

Sports Medicine - Open

Table 2 Baseline values and changes after 10, 18 and 26 weeks of training for group and response

From: Does Higher Intensity Increase the Rate of Responders to Endurance Training When Total Energy Expenditure Remains Constant? A Randomized Controlled Trial

	Baseline	Δ weeks 0–10	n (%)	Δ weeks 10–18	n (%)	Δ weeks 18–26	n (%)
VO_2max [mL min⁻¹ kg⁻¹]
CON
r	34.9 ± 3.5	2.5 ± 1.4	[8 (50)]	1.5 ± 3.5	[4 (25)]	2.0 ± 2.2	[6 (37)]
nr	34.9 ± 3.9	− 1.1 ± 1.1	[8 (50)]	− 2.4 ± 2.3	[12 (75)]	0.7 ± 1.3	[10 (63)]
INC
r	33.0 ± 4.7	2.6 ± 1.1	[8 (53)]	1.3 ± 2.5	[7 (47)]	2.4 ± 2.0	[13 (87)]
nr	35.0 ± 5.9	− 0.2 ± 0.8	[7 (47)]	− 1.5 ± 2.3	[8 (53)]	2.1 ± 0.1	[2 (13)]
VO_2max [mL min⁻¹]
CON
r	2595 ± 601	167 ± 15	[6 (37)]	171.0 ± 39.6	[2 (12)]	139.3 ± 144.7	[4 (25)]
nr	2596 ± 542	− 54 ± 93	[10 (63)]	− 151.4 ± 175.1	[14 (88)]	47.8 ± 120.5	[12 (75)]
INC
r	2645 ± 531	145 ± 64	[9 (60)]	78.7 ± 124.4	[6 (40)]	123.0 ± 142.2	[11 (73)]
nr	2343 ± 473	− 3 ± 60	[6 (40)]	− 162.1 ± 125.9	[9 (60)]	116.8 ± 129.9	[4 (27)]
V_max [km h⁻¹]
CON
r	11.2 ± 1.4	0.8 ± 0.3	[15 (94)]	0.2 ± 0.3	[16 (100)]	0.0 ± 0.3	[16 (100)]
nr	13.2 ± 0.0	0.4 ± 0.0	[1 (6)]	/ ± /	[0]	/ ± /	[0]
INC
r	10.8 ± 1.5	0.8 ± 0.3	[14 (93)]	0.5 ± 0.4	[14 (93)]	0.5 ± 0.4	[14 (93)]
nr	12.2 ± 0.0	− 0.4 ± 0.0	[1 (7)]	0.2 ± 0.0	[1 (7)]	− 0.6 ± 0.0	[1 (7)]
HR_rest [b m⁻¹]
CON
r	74.4 ± 9.2	− 9.0 ± 6.8	[7 (44)]	− 0.7 ± 5.8	[6 (38)]	− 1.6 ± 5.2	[4 (25)]
nr	65.3 ± 6.6	− 1.0 ± 1.6	[9 (56)]	3.5 ± 3.6	[10 (62)]	1.2 ± 3.0	[12 (75)]
INC
r	70.6 ± 4.2	− 8.2 ± 2.3	[5 (33)]	− 7.2 ± 5.7	[6 (40)]	− 3.0 ± 3.9	[13 (87)]
nr	66.7 ± 6.3	2.3 ± 4.1	[10 (67)]	− 0.3 ± 5.7	[9 (60)]	− 1.0 ± 2.8	[2(13)]
HR_submax [b m⁻¹]
CON
r	137.3 ± 7.7	− 7.4 ± 3.1	[8 (50)]	− 1.5 ± 5.7	[8 (50)]	− 0.5 ± 4.1	[10 (63)]
nr	134.6 ± 16.0	− 2.7 ± 2.3	[8 (50)]	2.1 ± 8.6	[8 (50)]	1.4 ± 4.9	[6 (37)]
INC
r	132.2 ± 15.6	− 10.8 ± 3.3	[7 (47)]	− 3.5 ± 5.5	[10 (67)]	− 2.0 ± 7.6	[10 (67)]
nr	132.7 ± 8.8	4.2 ± 3.8	[8 (53)]	− 4.4 ± 5.7	[5 (33)]	0.9 ± 7.5	[5 (33)]

Δ = changes after 10, 18 and 26 weeks of training for CON and INC in VO_2max [mL min⁻¹ kg⁻¹]; VO_2max [mL min⁻¹], V_max [km h⁻¹]; HR_rest [b min⁻¹]; HR_submax [b min⁻¹]; values are presented as means ± SD; r = responder, nr = nonresponder; n (%) = number (rate) of responders/nonresponders

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