A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Energy availability during training camp is associated with signs of overreaching and changes in performance in young female cross-country skiers (2021)

Kettunen, O., Ihalainen, J. K., Ohtonen, O., Valtonen, M., Mursu, J., & Linnamo, V. (2021). Energy availability during training camp is associated with signs of overreaching and changes in performance in young female cross-country skiers. Biomedical Human Kinetics, 13(1), 246-254. https://doi.org/10.2478/bhk-2021-0030

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Kettunen, Oona; Ihalainen, Johanna K.; Ohtonen, Olli; Valtonen, Maarit; Mursu, Jaakko; Linnamo, Vesa

Lehti tai sarja: Biomedical Human Kinetics

eISSN: 2080-2234

Julkaisuvuosi: 2021

Ilmestymispäivä: 01.01.2021

Volyymi: 13

Lehden numero: 1

Artikkelin sivunumerot: 246-254

Kustantaja: Sciendo

Julkaisumaa: Puola

Julkaisun kieli: englanti

DOI: https://doi.org/10.2478/bhk-2021-0030

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/77926

Tiivistelmä

Study aim: The aim of this study was to evaluate if young female skiers meet their energy and macronutrient requirements, and how energy availability (EA) and macronutrient intake affects their performance during an intensive training camp. Material and methods: 19 female cross-country skiers (age 16.7 ± 0.7) filled in 48-hour food and training logs during a 5-day training camp. Fasting concentrations of hemoglobin, leptin, triiodothyronine (T3), insulin, insulin-like growth factor 1 (IGF-1), and glucose were measured before (PRE) and after (POST) the camp. Blood lactate (LA), heart rate (HR) and rating of per-ceived exertion (RPE) from a submaximal treadmill running test, jump height from counter movement jump (CMJ), and power from a reactive jump test (RJ) were also measured PRE and POST. Results: Mean EA was 40.3 ± 17.3 kcal · kgFFM–1 · d–1. 58% of the participants had suboptimal EA, 37% had low EA, and 53% had suboptimal carbohydrate intake. HR, HR/RPE ratio, LA/RPE ratio, CMJ, hemoglobin, leptin, T3, and insulin de-creased from PRE to POST. RPE and glucose increased from PRE to POST. EA during the camp correlated with changes in LA (r = 0.54, p = 0.018), LA/RPE (r = 0.65, p = 0.003), and RJ (r = 0.47, p = 0.043). Conclusions: Many athletes had difficulties in meeting their energy and carbohydrate requirements during a training camp. Furthermore, sufficient EA may help to avoid overreaching and to maintain performance during an intensive training period.

YSO-asiasanat: urheilijat; naiset; harjoittelu; ravinto; ravinnontarve; ravinnonsaanti; hiilihydraatit; suorituskyky; ylikunto

Vapaat asiasanat: Carbohydrate; Female athlete; Macronutrient

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Raportointivuosi: 2021

JUFO-taso: 1