TY - JOUR
T1 - Dynamics of the Metabolic Response During a Competitive 100-M Freestyle in Elite Male Swimmers
AU - Hellard, Philippe
AU - Pla, Robin
AU - Rodríguez, Ferran A
AU - Simbana, David
AU - Pyne, David B
PY - 2018/9/1
Y1 - 2018/9/1
N2 - Purpose: To compare the dynamics of maximal oxygen uptake (V O
2), blood lactate ([La]
b), total energy expenditure (E
tot), and contributions of the aerobic (E
aer), alactic anaerobic (E
an,al), and lactic anaerobic (Ean,lac) metabolic energy pathways over 4 consecutive 25-m laps (L
0-25, L
25-50, etc) of a 100-m maximal freestyle swim. Methods: Elite swimmers comprising 26 juniors (age = 16 [1] y) and 23 seniors (age = 24 [5] y) performed 100 m at maximal speed and then 3 trials (25, 50, and 75 m) at the same pace as that of the 100 m. [La]
b was collected, and V O
2 was measured 20 s postexercise. Results: The estimated energetic contributions for the 100-m trial are presented as mean (SD): E
aer, 51% (8%); E
an,al, 18% (2%); E
an,lac, 31% (9%). V O
2 increased fromL
0-25 to L
25-50 (mean = 3.5 L·min
-1; 90% confidence interval [CI], 3.4-3.7 L·min
-1 to mean = 4.2 L·min
-1; 90%CI, 4.0-4.3 L·min
-1) and then stabilized in the 2nd 50 m (mean = 4.1 L·min
-1; 90% CI, 3.9-4.3 L·min
-1 to mean = 4.2 L·min
-1; 90% CI, 4.0-4.4 L·min
-1). E
tot (juniors, 138 [18] kJ; seniors, 168 [26] kJ), E
an,al (juniors, 27 [3] kJ; seniors, 30 [3] kJ), and E
an,lac (juniors, 38 [12] kJ; seniors, 62 [24] kJ) were 11-58% higher in seniors. Faster swimmers (n = 26) had higher V O
2 (4.6 L · min
-1, 90% CI 4.4-4.8 L·min
-1 vs 3.9 L·min
-1, 90% CI 3.6-4.2 L·min
-1), and E
aer power was associated with fast performances (P < .001). Conclusion: Faster swimmers were characterized by higher V O
2 and less time to reach the highest V O
2 at ~50 m of the 100-m swim. Anaerobic qualities become more important with age.
AB - Purpose: To compare the dynamics of maximal oxygen uptake (V O
2), blood lactate ([La]
b), total energy expenditure (E
tot), and contributions of the aerobic (E
aer), alactic anaerobic (E
an,al), and lactic anaerobic (Ean,lac) metabolic energy pathways over 4 consecutive 25-m laps (L
0-25, L
25-50, etc) of a 100-m maximal freestyle swim. Methods: Elite swimmers comprising 26 juniors (age = 16 [1] y) and 23 seniors (age = 24 [5] y) performed 100 m at maximal speed and then 3 trials (25, 50, and 75 m) at the same pace as that of the 100 m. [La]
b was collected, and V O
2 was measured 20 s postexercise. Results: The estimated energetic contributions for the 100-m trial are presented as mean (SD): E
aer, 51% (8%); E
an,al, 18% (2%); E
an,lac, 31% (9%). V O
2 increased fromL
0-25 to L
25-50 (mean = 3.5 L·min
-1; 90% confidence interval [CI], 3.4-3.7 L·min
-1 to mean = 4.2 L·min
-1; 90%CI, 4.0-4.3 L·min
-1) and then stabilized in the 2nd 50 m (mean = 4.1 L·min
-1; 90% CI, 3.9-4.3 L·min
-1 to mean = 4.2 L·min
-1; 90% CI, 4.0-4.4 L·min
-1). E
tot (juniors, 138 [18] kJ; seniors, 168 [26] kJ), E
an,al (juniors, 27 [3] kJ; seniors, 30 [3] kJ), and E
an,lac (juniors, 38 [12] kJ; seniors, 62 [24] kJ) were 11-58% higher in seniors. Faster swimmers (n = 26) had higher V O
2 (4.6 L · min
-1, 90% CI 4.4-4.8 L·min
-1 vs 3.9 L·min
-1, 90% CI 3.6-4.2 L·min
-1), and E
aer power was associated with fast performances (P < .001). Conclusion: Faster swimmers were characterized by higher V O
2 and less time to reach the highest V O
2 at ~50 m of the 100-m swim. Anaerobic qualities become more important with age.
KW - Energy contribution
KW - Growth
KW - Sprint
KW - Swimming
UR - http://www.scopus.com/inward/record.url?scp=85052884789&partnerID=8YFLogxK
U2 - 10.1123/ijspp.2017-0597
DO - 10.1123/ijspp.2017-0597
M3 - Article
C2 - 29466071
SN - 1555-0265
VL - 13
SP - 1011
EP - 1020
JO - International Journal of Sports Physiology and Performance
JF - International Journal of Sports Physiology and Performance
IS - 8
ER -