Bone mineral density in elite junior Olympic weightlifters

Conroy, Brian P.; Kraemer, William J.; Maresh, Carl M.; Fleck, Steven J.; Stone, Michael H.; Fry, Andrew C.; Miller, Paul D.; Dalsky, G. P.

doi:10.1249/00005768-199310000-00004

Cited by 120 publications

(83 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…So me aut hors re por ted an in cre a se of BMD in the troc han ter re gi on, 45,46 be ca u se the musc le pull is me di a ted thro ugh the for ce of the musc le con tracti on at the si te of at tach ment of ten don to bo ne; thus, bo ne may res pond lo cally to re al lo ca te the for ces ge ne ra ted from the musc le at the si te lo ading. 47 They sta ted that the re a son of not fin ding any in cre a ses in fe mo ral neck BMD may be the same mec ha nism sin ce no musc les are at tac hed to that re gi on.…”

Section: Bmd and Musc Le Strengthmentioning

confidence: 99%

Effects of Different Intensity Resistance Exercise Programs on Bone Turnover Markers, Osteoprotegerin and Receptor Activator of Nuclear Factor Kappa Β Ligand in Post-Menopausal Women

Karaarslan¹,

Büyükyazi²,

Taneli³

et al. 2010

Turkiye Klinikleri J Med Sci

View full text Add to dashboard Cite

A AB BS S T TR RA AC CT T O Ob b j je ec c t ti i v ve e: : To in ves ti ga te the ef fects of 12-we ek two-dif fe rent in ten sity re sis tan ce tra i ning prog rams on bo ne tur no ver mar kers, bo ne mi ne ral den sity (BMD), os te op ro to ge rin (OPG), and so lub le recep tor ac ti va tor of nuc le ar fac tor kap pa β li gand (sRANKL) in post me no pa u sal wo men. M Ma a t te e r ri i a al l a an nd d M Me et t --h ho od ds s: : Forty he althy wo men (aged 45-60 ye ars) par ti ci pa ted in the study. High-in ten sity gro up (HIG; n=14) wor ked 4 days a we ek and per for med two sets of 8-10 re pe ti ti ons at ~70-80% of 1 re pe at ma xi mum (RM). Low-in ten sity gro up (LIG; n= 13) wor ked in the sa me du ra ti on, with 13-17 re pe ti ti ons, at ~40-50% of 1RM. Con trol gro up (CG; n = 13) did not per form any exer ci ses. Body com po si ti on, 1RM va lu e for 10 exer ci ses, re pe ti ti ons of sit-ups for 30 se conds, bo ne for ma ti on and re sorp ti on mar kers, se rum os te o cal ci ne (OC), bone al ka li ne phosp ha ta se (BAP), βCross Labs, OPG, and sRANKL le vels we re me a su red be fo re and af ter the tra i ning prog ram. BMD was me a su red vi a du al energy X-ray ab sorp ti o metry. R Re e s su ul lt ts s: : Re sis tan ce tra i ning ca u sed in cre a ses in spi ne BMD in HIG and LIG (p< 0.05), and OC le vels in cre a sed in the HIG (p< 0.05). We ob ser ved a sig ni fi cant dif fe ren ce bet we en the per cent chan ge in HIG ver sus the per cent chan ge in CG in the spi ne BMD va lu es (p< 0.01). sRANKL le vels dec re a sed sig ni fi cantly in all three gro ups. Strength me asu res in cre a sed in both exer ci se gro ups (p< 0.001), fa vo ring the HIG. C Co on nc c l lu u s si i o on n: : High-in ten sity re sis tance tra i ning may be mo re ef fec ti ve for in cre a sing musc le strength and pro tec ting aga inst os te o po ro sis and frac tu res. Du e to in sig ni fi cant chan ges in OPG le vels and sig ni fi cant re duc ti ons in sRANKL in all gro ups, me a su res of cir cu la ting OPG and sRANKL le vels se em not to be so use ful to pre dict BMD or bo ne tur nover sta tus af ter re sis tan ce tra i ning prog rams. The re fo re, the se pa ra me ters re ma in to be de ter mi ned di rectly in the bo ne mic ro en vi ron ments to get her with BMD me a su res and bo ne tur no ver mar kers.K Ke ey y W Wo or rd ds s: : Os te o po ro sis, post me no pa u sal; RANK li gand; os te op ro te ge rin Ö ÖZ ZE ET T A Am ma aç ç: : İki fark lı yük len me şid de tin de ya pı lan 12 haf ta lık di renç an tren man prog ram la rı nın postme ne po zal dö nem de ki ka dın la rın, ke mik tur no ver mar ker le ri, ke mik mi ne ral yo ğun lu ğu (KMY), os te opro ge rin (OPG) ve so lub le nük le er fak tör kap pa Β re sep tör ak ti va tör li gan dı (sRANKL) üze ri ne olan et ki si ni be lir le mek. G Ge e r re eç ç v ve e Y Yö ön n t te em m l le er r: : Post-me no poz dö nem de ki 40 sağ lık lı ka dın (45-60 yaş) ça lış ma ya ka tıl -dı. Yük sek şid det gru bu (YŞG; n= 14) haf ta da 4 gün, 1 tek rar mak si mu mun (TM)...

show abstract

Section: Bmd and Musc Le Strengthmentioning

confidence: 99%

Effects of Different Intensity Resistance Exercise Programs on Bone Turnover Markers, Osteoprotegerin and Receptor Activator of Nuclear Factor Kappa Β Ligand in Post-Menopausal Women

Karaarslan¹,

Büyükyazi²,

Taneli³

et al. 2010

Turkiye Klinikleri J Med Sci

View full text Add to dashboard Cite

show abstract

“…running or crosscountry skiing) produce these positive effects on bone mineral. Typically, the greatest bone mineral changes occur in the regions affected by the particular type of exercise, although positive changes are noted in other areas as well (Pirnay et al, 1987;Conroy et al, 1993;Heinonen et al, 1993;Hamdy et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Bone mineral density in triathletes over a competitive season

McClanahan¹,

Ward²,

Vukadinovich³

et al. 2002

Journal of Sports Sciences

View full text Add to dashboard Cite

There is evidence from previous cross-sectional studies that high volumes of certain sports, including running, swimming and cycling, may have a negative impact on bone mineral density. The aim of the present study was to evaluate prospectively the effects of high athletic training in individuals who engage in high volumes of all three of these activities (triathletes). Bone mineral density for the total body, arms and legs was determined by dual-energy X-ray absorptiometry in 21 competitive triathletes (9 men, 12 women) at the beginning of the training season and 24 weeks later. Age, body mass index, calcium intake and training volume were also recorded to examine potential mediators of bone mineral density change. Men had greater bone mineral density at all sites than women. No significant changes were observed over the 24 weeks for either total body or leg bone mineral density. Bone mineral density in both arms increased by approximately 2% in men (P < 0.03), but no change was observed for women. Change in bone mineral density at all sites was unrelated to age, body mass index, calcium intake and training volume. The results suggest that adverse changes in bone mineral density do not occur over the course of 6 months of training in competitive triathletes.

show abstract

“…According to previous studies, power-lifting female athletes show no significant bone gain compared to nonathletic female subjects [18,29]. In contrast, other studies have shown significantly higher aBMD in elite male weightlifters compared to age-matched controls of both nonathletic [44,45] and recreational low-intensity resistance training young men [46]. However, the terms "weightlifting" and "power lifting" refer to competitive sports that involve exercise with heavy loads and attempts to lift maximal amounts of weight, while the sport of "bodybuilding" has the goal to maximize muscle size, symmetry, and definition.…”

Section: Discussionmentioning

confidence: 90%

Sport specific association between exercise loading and density, geometry, and microstructure of weight-bearing bone in young adult men

Nilsson

Ohlsson

Mellström

et al. 2012

Bone

View full text Add to dashboard Cite

Summary In this population-based study of 24-year-old men, we have investigated the association between sportspecific exercise loading and different bone parameters. We reveal that the association between exercise loading and bone parameters is sport-specific, indicating that nonspecific resistance exercise does not impact bone density, geometry, or microstructure in young men. Introduction In this cross-sectional study, the association between nonspecific resistive exercise and areal and volumetric bone density, bone geometry, or bone microstructure was investigated in young adult men. Methods A total of 184 male athletes, 24.0±0.6 years of age (mean±SD), representing nonspecific resistive exercise and soccer (proportion of recreational athletes, 93.4 and 7.7 %, respectively), and 177 nonathletic age-matched controls were measured with dual-energy X-ray absorptiometry. Radius and tibia were measured by peripheral quantitative computed tomography (pQCT) at the diaphysis and by three-dimensional pQCT at the metaphysis.Results Men in the nonspecific resistive exercise group had higher grip strength(9.1 % or 0.4 SD) and higher lean mass (5.6 % or 0.5 SD) than those in the nonathletic group(p< 0.01 and p<0.001, respectively). However, men who participated in nonspecific resistive exercise did not have higher bone density or a more favorable bone microstructure or geometry than their nonathletic referents. In contrast, men playing soccer had higher areal bone mineral density (aBMD) at the femoral neck (19.5 % or 1.2 SD) and lumbar spine (12.6 % or 1.0 SD), as well as larger cortical crosssectional area (16.4 % or 1.1 SD) and higher trabecular bone volume fraction (14.5 % or 0.9 SD), as a result of increased trabecular number (8.7 % or 0.6 SD) and thickness (5.7 % or 0.4 SD) at the tibia than men in the nonathletic group(p<0.001). Conclusions Weight-bearing exercise with impacts from varying directions (playing soccer) is associated with aBMD and volumetric BMD, cortical bone geometry, as well as trabecular microstructure of weight-bearing bone. Nonspecific recreational resistance exercise does not appear to be a strong determinant of bone density, geometry, or microstructure in young adult men.

show abstract

Bone mineral density in elite junior Olympic weightlifters

Cited by 120 publications

References 0 publications

Effects of Different Intensity Resistance Exercise Programs on Bone Turnover Markers, Osteoprotegerin and Receptor Activator of Nuclear Factor Kappa Β Ligand in Post-Menopausal Women

Effects of Different Intensity Resistance Exercise Programs on Bone Turnover Markers, Osteoprotegerin and Receptor Activator of Nuclear Factor Kappa Β Ligand in Post-Menopausal Women

Bone mineral density in triathletes over a competitive season

Sport specific association between exercise loading and density, geometry, and microstructure of weight-bearing bone in young adult men

Contact Info

Product

Resources

About