Metabolic parameters of lumbar muscle fatigue resistance in lower backpain patients and controls

Anthropometric data and changes in aerobic muscle and cardiovascular metabolism during isometric lumbar exercise to exhaustion (Soerensen test). Abbreviations: Group, patients or matched controls; Gender, (male =2, female = 1); Age, years of age; acetyp, insertion/deletion genotype for polymorphism rs1799752 in the gene of angiotensin concertingy enzyme; tenascin, genotype for polymorphism rs2104772 in the tenascin-C gene; Sportsscore, physical activity levels; Duration, time-to-exhaustion [sec]; SorensenT_accomplished, exercise test duration >240 seconds; Best_Stronghand, handgrip strength dominant side [kg]; Best_Weakhand, handgrip strength minor side [kg]; BMI, body-mass index [kg m-2]; Height, body height [cm]; Weight, body weight [kg]; Smoke, regular smoker [1=yes]; Sportsscore_calc, physical activity levels (full calculation); LAC_baseline, blood lactate concentration at baseline [mM]; LAC_Cessation, blood lactate concentration after exhaustion [mM]; LAC_2min_post, blood lactate concentration 2 minutes after exhaustion [mM]; LAC_2minvs0min_post, delta in blood lactate concentration 2 minutes versus immediately after exhaustion [mM];
LAC_2minvsbase, delta in blood lactate concentration after exhaustion versus baseline [mM]; LAC_max_post, maximal blood lactate concentration after exhaustion [mM]; AUC_D_SmO2_Long, AUC for the delta of oxygen saturation in M. longissimus during isometric lumbar exercise [% sec];
AUC_D_tHb_Long, AUC for the delta of total hemoglobin concentration in M. longissimus during isometric lumbar exercise [g dL-1 sec]; AUC_PP, AUC for the delta of peak blood pressure during isometric lumbar exercise [mm Hg sec]; AUC_MAP, AUC for the delta of mean arterial blood pressure during isometric lumbar exercise [mm Hg sec]; AUC_HR, AUC for the delta of heart rate during isometric lumbar exercise [beats x 60]; AUC_p_t_SmO2_Long, AUC for the delta of oxygen saturation in M. longissimus per time during isometric lumbar exercise [%]; AUC_p_t_tHb_Long, AUC for the delta of total hemoglobin concentration in M. longissimus per time during isometric lumbar exercise [g dL-1]; AUC_p_t_PP, AUC for the delta of peak blood pressure during isometric lumbar exercise [mm Hg]; AUC_p_t_MAP, AUC for the delta of mean arterial blood pressure during isometric lumbar exercise [mm Hg]; AUC_p_t_HR, AUC for the delta of heart rate per time during isometric lumbar exercise [beats per minute]; Fat_longissiumus, thickness in fat of longissimus muscle [cm]; Fat_multifidi, thickness in fat of multifidus muscle [cm]; Fat_Mean, thickness in fat of lumbar muscles [cm].