M ;• 1 , / , J I j 1 ^ 1 >• Kha nang thfch nghi cua hoc sinh THCS Nghien ciru nham muc dfch nang cao chat lugng sire khde cho hoc sinh (HS) dang la nhiem vu quan trong vi nd lien quan true liep tdi hi[.]
M ;• -J I j ,/, 1^1 Kha nang thfch nghi cua hoc sinh THCS ::>• ThS BS NGUYEN THI QUYNH HlJONG Tradng Dai hpc Sa pham Ha Ndi N ghien ciru nham muc dfch nang cao chat lugng sire khde cho hoc sinh (HS) dang la nhiem vu quan vi nd lien quan true liep tdi hieu qua cua cong tac day hoc va giao due nha trudng phd thong Theo cac tac gia nghien cuu, cae chi so cua he thong tim mach duge coi la the hien tuong dbi ehfnh xac su thfch nghi cua ca the noi chung Ren luyen de co mot he tuan hoan khde manh la tieu chuan vang cho mot ca the deo dai, hoan hao va dbi vdi HS viee hoe tap cung dugc tien hanh thuan lgi han anh sue cang cua ca tim, miic dp tieu thu oxy cua ca tim (Xmimova, 1991) DP = HATD (huyk ap tdi da) x nhip tim: 100 DP tu 70-80 dan vi: phan anh hoat dong tim mach d mue binh thudng (Travinxkaia, 1978) DP < 60 dan vi: haat dong cua tim d muc tdi thieu nhung van bao dam cho tieu hao nang lugng cua ca the d muc thap nhat - Danh gia muc thfch nghi eua ea the thdng qua eae ehi so DP va nhip tim: > Mue rlt tdt: DP < 60 don vi, nhip tim Mue tdt: DP va nhip tim < 70 Nghien eiru duge tien hanh tren 704 HS tir ldp den Idp cua eac trudng thupe Ha Noi Tfnh thieh nghi eua HS dugc danh gia thdng qua hoat dong cua he thong tim mach vai cac chi sd tren huyet ap va dien tam dd Cac chi sd phan tfch gdm cd: > Mue trung binh: DP tu 70-90, nhip tim tu 70-80 > Mue ylu: DP>90, nhip tim >80 Chi so tich diip DP - Chi sd dup (DP) la chi sd tfch hgp phan Bang 1: Phan loai chi so diip DP theo cac khoi lop 80 Solugng % Tong so Tong so Lop np 3 0.6% 1.8% 1.0% 1.8% 1.3% 28 46 34 32 140 16.6% 140 82.8% 169 27.9% 116 70.3% 165 17.0% 164 82.0% 200 18.8% 19.9%^ 135 79.4% 555 78.8% 170 DAY VA HQC NGAY NAY SO 7-2010 704 So HS cd DP < 60 dem vi rlt it chi ehilm khoang 1,3% O nhiing em hoat ddng eiia tim d mue tbi thieu nhung vln bao dam eho tieu hao nang lugng eua ea the d mue thap nhat Sd HS ed DP tu' 70-80 don vi khdng nhi6u 60- chi chiem khoang 19,9%), cao nhat la khdi 7, sang lop so em d loai giam di nhiiu va ehi den ldp sd lugng mai hdi phuc lai Day la nhung em cd hoat dong tim , , , , mach d muc binh thudng 20' Didu cin luu y la sd lugng em cd DP> 80 chiem so lugng ldn khoang 78,8%o, sd em eao ro Lap ret d ldp va 8, sang Idp sd lugng giam di edn 79,4%) Nhirng em cd sir su cang nDP:60-80 DP