Hokkaido University of Education

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Title 血中乳酸濃度2mmol/1時のローラースキー交互滑走の運動強度

Author(s) 小林, 規

Citation 冬季スポーツ研究, 3(1): 19-25

Issue Date 2001-03

URL http://s-ir.sap.hokkyodai.ac.jp/dspace/handle/123456789/6783

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Intensity of diagonal stride during treadmill uphill roller-skiing in cross-country ski racers

Tadashi KOBAYASHI

Lahorntory of Biomechanics and Sports Performance, Research and Education Center for Winter Sports, Hokkaido University of Educarion

Abstract The Purpose of this study was to clarify the physiological and physical intensity of diagonal stride during treadmill roller-skiing. Tweniy eight cross-country ski racers ( 15 junior (Jr), 1 1 senior biathlon athletes (Sr), 2 national team members (NT) ) participated as subjects. V0,max and HRmax were measured in an incremental running test. Relationship between blood lactate concentration(lA) and heart rate war measured at every stage (3 min) of incremental grade protocol of roller-skiing test to determine the %HRmax at 2 mmol/l LA. Significant difference was observed in V02max (NPSr>Jr), but there was no significant difference in HRmax in either group. The mean value of %HRrnax at 2 rnmol/l LA were 86.5 f 4.8% (Jr), 85.4+2.7% (Sr) and 90.0*2.3% (NT). Although no signifjcant difference was observed in the mean value of %HRmax at 2 mmol/l LA between Jr and Sr, Sr shows significantly higher stage (4.3 k0.5) of protocol than Jr (2.7-t 0.9). These results suggest that 85-87%HRmax is effective to determine the exercise intensity of 2 mmolll LA in uphill roller-skiing by diagonal stride to cross-country ski racers with 60-70 ml/kg/rnin V02max, and that the prescription of the relative 85-87%HRmax would lead the different speed and gradient of roller-skiing according to aerobic capacity, metabolic condition, emciency and experience in diagonaL stride.

Key words: cross-country ski ; diagonal stride ; blood lactate ; 2 rnmolJl ; %HRmax

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Table 1. Treadmill protocol to measure blood lactate and heart rate.

Stage Time Speed Grade (rnin) (kmfi) (dep)

1 0-3 5.5 4.5

Table 2 . Physical characteristics of the subjects

n,nurnber of subjects n Age HRmax Vo2max Jr : Junior cross-country racers

(years) (beat/rnin) (mlJkgJmin) St : Senior biathlon athletes

Jr 15 16.3310.8 193.5 f 6,s 62.5 f 5.0 NT : National team mcmbers

NT 2 28.Ik2.8 * * 195.0f7.1 78.2f 0.2 * * # values arc means f SD

$!$d&A%! b L Y < )I/ (Kuntovaline a@, 2040)

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fifiiriatlThl5%L~k~fIrtTP$ Lf:8C')E%IH1t4A% (%H~max) 2 L e o

4 h$R@BB 2 mmolll ~ ~ ~ J r ; f ~ t ~ # 1 9 ! ! R ~ B ~ $3 5 hk7 -9 k 13 ; f ; R $ $ r L ~ @ ~ - i f U ~ ~ l , f i ~ ~ ~ j ~ ~

{%%%$YT 7 ??f'FaL, 2 mmoV1 kG%BQil;jS%

Fig. 1 The relationship between exercise intencity expressed as percentage of maximum heart rate and blood lactate concentration during incremental treadmill rollerskiing test

*hJf%o3ZkR$%!:Ff4X?ifl~IZ s'n b 7 IL CA Bruce

& ! s & X ? - Y U l ~ ! f ! ! ~ ~ ~ n % 2 #F:AC~RA@7$77 k f+> ~ x F - 5 T f i E 3 f 2 m f i h 5 z ; ~ ~ ~ l z ~ ~ z ~ h;m:E7skL, 8ffFtfid32ik tTDF:9%laii~&3I;RZfd: 7 5 ~ 9 ko

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Table 3. Physiological intensity and stage of protocol at 2mmol/l blood lacfate concentration during incremental roller-skiing test

%HRmax Stage

Jr 86.5 f 4.8 2.7 f 0.9

Sr 85.4k2.7 4.3k0.5 * * NT 90.0-f-2.3 # 6.5f 0.7 * * ##

Jr : Junior crass-country raccrs Sr : Senior biathlon athlete NT : National team members ** pc0.001 Jr vs Sr or NT #p<0.05 ## pcO.DOl Sr vs NTT Values are means f SD

kMS?f3L), Lk*hg7T Jr n, Sr E ? l A P 9 P k )biki&LZM LTE~%i$lax+-BTkL~2, -E PDX732 b ' ~ - X + - E & $ Z * % i t & j - & % ~ ~ * 2 T E L3kQLlo 1 a@%BSE 2 mmoU1 Vl4>%@8&@

*liJf%Tlll L k 2 rnmol/I Ol$iEC& LT '" OBLA rn~qtz% 9 LT ~ L E L I ~ c , t z * w m m ~ ~ ~ ~ ~ ~ ~ ~ & T I ~ T ~ Z & ~ ~ $ ~ & E @ T ~ ~ M T & R ~ ~ ~ ~ C P ~ L flC$..E 2 mmol/l l l ~ ~ t L ~ ~ B ~ ~ b T h ~ & ~ G f i ~ l ~ ~ ~ f i 2h80 L k h x 7 T LT 2 CZBZB6lt l&hTh~ I:Etjhl, LT CZ~F~L~#ER~LL 5 z kr=1;7"$.~. @$j

@!;if?: 2 LTU3 2 mmolJl 13 LT ? OBLA 03 k 5 I,% @~?ntJ!%fitnW{$I-fGdC~ Lj CT iZZLj&t'fg% rn b t - -3>5f%%Jek LT$I IB j$hTL lE to Steinacker 9, M$-- b b L - - Z 2 7 T 2 mmol/l LIT;Di;i%EF,-hsllhRItiNI= fi@T W 4, llEYT4t%Ekb mti-ktza 4 P L r x n t m ~ a ~ L n m * ~ z ~ e ~G)J%&S@LLL~Q~

f i ~ ~ ~ f i c i z ~ ~ ~ r n n i t ~ ~ ~ ~ 4 A 9 z ~ t ~ ~ t m - afii.Zk L T h 4 1 Z k R & 8 ! @ 3 i ~ h ~ ; h ~ r Z M A h b L - ~ > Y ~ ~ ~ ~ C I A Z C Z ~ I ~ ~ ~ ~ L T S ; ~ ~ "", h $8Lfi@i,?E iZ & 6 i- L -= > Y&Eo%ZCAE%M i : i ~ z + m ~ i ~ ~ L T ~ E W + T ~ , JZGIL~~&+ ~ $ h $ ) ] $ ~ Z ~ L \ Q I & L r U J z f ! f ~ & f i k I,

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Table 4. Gradient of %HRmax-blood lactate curve at 2mmolll blood lactate concentration during incremental roller-skiing test Gradient (mmoI/t/%)

Jr 0.155f 0.084

NT Q.240-t-0.012 # Jr : Junior cross-country racers Sr : Senior biathlon athlete NT : National learn members #pe0.01 Sr vs NT Valucs arc means f SD

9 7 9 ~ILZ~&D~&$RCLZ LL\EfRhl& Ef hib, Jr

?$ Sr ~ f i ~ ~ Z ~ ~ 4 ) % H R r n a x %$I1H RIB 6 L 2 @T $6 : k @ Z @ $ h k o

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D%HRmax 15'; 90.0% 2 Sr fitL$f L T a t l @ 8 5 I, ko -i&9 m x f i > b '1 - ~ + - ~ ~ - F I ~ - - E ~ ~ E Z L t 4 T L i E 2 rnmol/l D3~%BQ3$Bf iE LC k i m s t ~ , f i f i ~ ~ 7 i ~ i 2 9 3 ~ a ) ~ z i m + ~ r n

2L) 2 60 PB~.~~;~~&C~$.~~TIA$EFEB%D&E~~~+ 7L%i2Bi:ia2!! L k T k E kaFdl:i$fi%amMmf%

< ~zz t t -r t \at31 41, R T C L Z F ' - C ~ ~ ~ ~ ~ ~ TaE%Tl3dnWL%ii%3m&% k@#&k31?1km F ~ L : I ~ & ~ Q ~ H M M ~ % ~ ~ B % $ ~ T L ~ & lo'* *me 1: k; 43 6 NT Rf 71B2$2 @ 2 rnmour R n%HRmax AS 90.O%T bjj 6 L 2 E Z f i 8 h l d , Sr flsEFTdd: 5 $4 > b fi;if2a5ibslti$f7kTm&% firft!f~?T360 J r f l C Z M L T 5 M @ ~ ~ k h - h r Z f t i . ~

LY-k 4. ~ k i % % M @ ! f l h s 60 -hi 5 70 ml/kg/min

#?ET, 7 ! l h T 9 5 ~ ~ J ~ ~ i & i ~ ~ I d T ~ F J % ~ k r n X +-E%fiS, 8 7 9 - x > ~ ~ q ~ ~ R ~ ~ ~ ~ 5 $4mT aP59a)lJ$<&a !? b-=>Yggfi$z,Kje, I ( I l % & f i $ ~ ~ 2 mmolll R ? i . ~ % ~ ~ r n a x 2 LT 8 6 % E ~ m r i r n ~ a r ~ ~ X T S ~ Z 2i543q22i1t=~ 2 ~ $ % @ # ! ! E 2 r n r n o l / l R ~ ~ B ~ & B

%7fll'f!l$il%T&& b t s F <?LTU b 7 I L D X 4 -9&T 2< L k ~fnYLI7$i$B 2 mmolll fiB3iFhfiK~ tzca 3 I l ~ ~ B l ~ k ~ ~ ~ L ~ I I ~ ~ 5 hko 7 t j r f i n m ~ ~ 1 ~ \ k b L .;l F < ~ L l n b 31~8Rj ~\h(ddnCp$LRi,2E 2 mmol/l L A T T ~ k L 5 % l ~ L 6 km/h OlsE7'6hc 5 Js flTd2 6.1 deg, Sr #TI$ 9.9 deg,NT @PC2 13.5

deg T & b, %lfl?IZ12 Jr f l Sr flF1FIT 3.8 deg, Sr f l

NT%FBdT 3.6 d e g C 9 i Z l \ h i & ~ 2oNT%TP1A 13.5 deg

2 Jr 2 EtAkOQfi???E6 Z k h x T 3 k o z m % x i ~ ~ # m T ~ E ~ k ~ i ~ ~ L LJZL~h~& 6

t k%Z'.LbjIo 3 RPeq(ZiA.r;T=JGT-ifiR$~ @ k ~ f i & & $ Z k @ 3 ~ 5 @ 3 i z z L ~ f i ~ & & k &, %HRrnax T Z L k%ljr;fb!J$&@fi3Fl LT & 3 7 6 ;k$jr;JiK~S$Ek ~~amE$3E(r2t \h 'Bh5aI&% ??%BZ kTA80 %CZ Jr f l ) I Sr RL7qPi$!kR!M% ECZdA Sb%I-IRmax f?EkSZjfisHGkLl'bfi'-sk~, %SRtlS$El.ti;t: 2 ~ 7 - 5 h t ~ k 3 8 2 3 t ~ h ~ R 5 k L k, -EIL%8i"i7k%-hl.GAk6E%@%E%B kd+ it a%# b fi)batA;C jiEFI3 ~Ea&igfi{fR < flP2 6 h, b L - = > Y D ~ R ~ ~ T ; T ; % C B P - ~ ~ & ~ ~ ~ ~ z k7Y$3Lj0 ZOJZ kiAZtZZ2i~, ~ f 2 T I A Z ~ B ~ : f t s s h 6 R h ~ i f a $ $ E e ~ * k L 7 b b - 1 7 Y&Bf7?& ?at:, %l3ifiFjfi%DIRt~E#&%-l3Z A

~Z@.7%Ulbb-=>Fk@!l, kkkiz$% LT b

WbaGEZm I- b - ~ > 7 % T 4 % 2 Z ? 5 * E E 3ZWJt39.hU3 b L - L > Y % i 7 5 Z kIZfb.6, 3'7 9 h)L+3 €I a%fih h k I L i 2 , R 5 aw, ZEiRX !WJ~'F 2 Ll5 R#QZ5h4A%T*g$%RD4-tHRfk8 a$ L~#J$)J+&$@)~ 2 Ll -j QJm8&~.ag$z Z L 9 9 b b-=>Y$i75 ZkhGFET&&O

$ 5 12, j@45km;J ~ $ ~ ~ Z Z + - - ~ ~ I J A - ~ ~ B ~ 7 .i AlbZ$&Tl$, # E ~ E ~ ? ~ ~ ~ E I ~ & C Z X + - ~ T ~ ~ MiZRl$k14% 1; $ % 6 G 5 b i h ~ ~ % f h, PkkmZ z m i z ~ ~ 4 7 1 ~ 7 ~ - ~ ~ x ~ s ~ a e a i : f i m n zgn=As < zn.ra0 +J 9 H I J L Z : A I Z % I ~ ~ E ~ ~ ? I I ? L ~ E & S T ~ & ~ Z I A , WV$fiE%R+nLtt L 2 E 3 Z K % s l X k Z h T & & i Z k @ % M ~ G , $3 ETSa~Zkm.r=r;lb=Y-jifjfl~Fk LTD LT $96 1\12 OBLA 5 , 3 !I Q % I A C P ~ % _ V . ~ ~ ~ ? ~ : + I L ~ G @ I &!7!)35&?? LTLj< &~Efi~&?5 50 3 &$%EBE 2 mmolfl R4>%4t;%B

Z DfifiIA%HRrnax A1 I $4 > b elk, L kB?IZ84L B&rfn$$l~i2E5~G~;kB& %HRrnax Ol I $4 > b D$!@~$r fn$%@~~~L~= LT Jr R P k0.155

mmol/I, Sr f#Tk0.126 mmol/t . k l J b $ t ~ ? ! l ~ NT 1IY'e I& 0.240 mmolJ1 .kksL~., Z h l d . NT ~ D R ~ D F ? &fikAhsi%%Eak Z 5 %TE&GhT t i6ff&T &ab, Lkhr-s,T, NT no$; 5 E; LT L<ILUl;%I\

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