Research progress on the application of perturbation?based balance training in fall prevention in the elderly
SHI Mingjuan1, ZHANG Xuehong2*, WANG Nan1, ZHANG Yadi1, YAO Lijun2
1.Chengde Medical University, Hebei 067000 China;2.Affiliated Hospital of Chengde Medical University
*Corresponding Author" ZHANG Xuehong, E?mail: cdfyzhxh@126.com
Keywords" the elderly; falling; perturbation?based balance training; review
摘要" 基于擾動(dòng)的平衡訓(xùn)練作為一種有效預(yù)防老年人跌倒的方法備受關(guān)注,主要對(duì)基于擾動(dòng)的平衡訓(xùn)練相關(guān)設(shè)備的優(yōu)缺點(diǎn)進(jìn)行綜述,為預(yù)防我國(guó)老年人跌倒提供新思路。
關(guān)鍵詞" 老年人;跌倒;基于擾動(dòng)的平衡訓(xùn)練;綜述
doi:10.12102/j.issn.1009-6493.2024.24.031
我國(guó)疾病監(jiān)測(cè)系統(tǒng)數(shù)據(jù)顯示,跌倒是我國(guó)65歲以上老年人因傷致死的首位原因[1]。在我國(guó),每年約有4 000萬(wàn)例老年人至少發(fā)生1次跌倒,且跌倒的發(fā)生率隨年齡增長(zhǎng)而顯著增加,嚴(yán)重威脅老年人身心健康[2]。據(jù)統(tǒng)計(jì),我國(guó)每年因跌倒產(chǎn)生的直接醫(yī)療費(fèi)用在50億元人民幣以上,經(jīng)濟(jì)負(fù)擔(dān)約為800億元人民幣[3],可見(jiàn),老年人跌倒已經(jīng)成為嚴(yán)重的公共衛(wèi)生問(wèn)題之一。第七次全國(guó)人口普查結(jié)果顯示,我國(guó)目前60歲以上老年人口占18.7%,其中65歲及以上人口占13.5%[4]。我國(guó)老年人口數(shù)量龐大,跌倒的負(fù)擔(dān)將繼續(xù)增加,應(yīng)制定有效的干預(yù)措施,降低老年人跌倒事件的發(fā)生。平衡訓(xùn)練可有效改善老年人的平衡控制,并將老年人的跌倒率降低約24%[5]。傳統(tǒng)的平衡訓(xùn)練主要關(guān)注訓(xùn)練者自己主動(dòng)控制平衡,而老年人常因無(wú)法控制的意外事件發(fā)生滑倒和絆倒[6]?;跀_動(dòng)的平衡訓(xùn)練(perturbation?based balance training,PBT)是一種特殊類(lèi)型的平衡訓(xùn)練,該平衡訓(xùn)練模擬了與現(xiàn)實(shí)生活情況非常相似的意外身體失衡,因此,基于擾動(dòng)的平衡訓(xùn)練獲得了許多學(xué)者的關(guān)注。有證據(jù)表明,基于擾動(dòng)的平衡訓(xùn)練可將老年人日常生活中跌倒減少40%~50%[7]。由此可知,相對(duì)于傳統(tǒng)的平衡訓(xùn)練,基于擾動(dòng)的平衡訓(xùn)練對(duì)于預(yù)防老年人跌倒的效果更好[8]。
1" 概念
許多國(guó)外學(xué)者使用基于擾動(dòng)的平衡訓(xùn)練預(yù)防跌倒,Pai等[9]運(yùn)用基于擾動(dòng)的平衡訓(xùn)練對(duì)老年人進(jìn)行了干預(yù)訓(xùn)練,發(fā)現(xiàn)該平衡訓(xùn)練對(duì)預(yù)防老年人跌倒有積極效果;Lurie等[10]通過(guò)臨床試驗(yàn)證實(shí)了基于擾動(dòng)的平衡訓(xùn)練的臨床可行性;Lurie等[11]在臨床中進(jìn)行了一項(xiàng)大型的隨機(jī)對(duì)照試驗(yàn),證實(shí)了基于擾動(dòng)的平衡訓(xùn)練對(duì)預(yù)防跌倒的積極作用。隨著基于擾動(dòng)的平衡訓(xùn)練研究不斷加深,國(guó)外對(duì)基于擾動(dòng)的平衡訓(xùn)練不僅用于預(yù)防老年人跌倒,還涉及腦卒中[12]、脊髓損傷[13]等病人跌倒。
目前,國(guó)內(nèi)外對(duì)基于擾動(dòng)的平衡訓(xùn)練還沒(méi)有統(tǒng)一的定義,通過(guò)文獻(xiàn)可以了解到,基于擾動(dòng)的平衡訓(xùn)練是一種新興的預(yù)防老年人跌倒的干預(yù)措施,該平衡訓(xùn)練是專(zhuān)業(yè)人員使用相關(guān)設(shè)備對(duì)訓(xùn)練者進(jìn)行無(wú)預(yù)兆的擾動(dòng),這些擾動(dòng)是在安全和可控的環(huán)境中引起訓(xùn)練者跌倒,安全設(shè)施可恢復(fù)訓(xùn)練者的穩(wěn)定姿勢(shì)?;跀_動(dòng)的平衡訓(xùn)練主要是模仿日常生活中跌倒的偶然性和意外性,該平衡訓(xùn)練是故意對(duì)個(gè)人的步態(tài)周期造成輕微的、不可預(yù)測(cè)的干擾,通過(guò)擾動(dòng)的平衡訓(xùn)練可使他們能夠建立起跌倒防御機(jī)制,從而減少跌倒的發(fā)生。
2" 常見(jiàn)設(shè)備
2.1 基于擾動(dòng)訓(xùn)練的跑步機(jī)
由1臺(tái)寬大的跑步機(jī)和1個(gè)帶骨盆支架的驅(qū)動(dòng)骨盆連桿組成,骨盆支架用于訓(xùn)練者在跑步機(jī)行走期間對(duì)骨盆內(nèi)側(cè)和前后方向傳遞擾動(dòng)力脈沖,這可以訓(xùn)練平衡、步態(tài)和步態(tài)的適應(yīng)能力,跑步機(jī)的皮帶可無(wú)預(yù)兆地向前、向后和橫向搖擺產(chǎn)生擾動(dòng),從而使訓(xùn)練者喪失平衡[14]。訓(xùn)練者可以體驗(yàn)和訓(xùn)練意外的絆倒和滑倒,而不會(huì)有跌倒的風(fēng)險(xiǎn),因?yàn)榘踩珟Э梢怨潭ㄓ?xùn)練者保持平衡。該跑步機(jī)不需要較大空間,這種設(shè)置在臨床環(huán)境中較為可行。在使用基于擾動(dòng)的跑步機(jī)進(jìn)行訓(xùn)練時(shí),可能會(huì)產(chǎn)生較大的地面反應(yīng)沖擊力,超出了許多老年人的能力尤其是患有嚴(yán)重下肢骨關(guān)節(jié)炎的病人[8],所以對(duì)于虛弱和下肢關(guān)節(jié)炎的病人不建議使用。
2.2 EPES(elliptical perturbation system)系統(tǒng)
EPES系統(tǒng)是一種重達(dá)140 kg的機(jī)電一體化設(shè)備,可在原地行走過(guò)程中提供三維擾動(dòng)傾斜,它由1個(gè)固定的橢圓系統(tǒng)組成,該系統(tǒng)安裝在1個(gè)運(yùn)動(dòng)平臺(tái)上,該運(yùn)動(dòng)平臺(tái)由2個(gè)直流電機(jī)和與之相連的齒輪組成[8]。該系統(tǒng)提供最大8°的三維擾動(dòng)傾斜角度,并配備了攝像裝置,可在給出未經(jīng)通知的平衡擾動(dòng)后捕獲和識(shí)別訓(xùn)練者的平衡反應(yīng),并及時(shí)反饋給訓(xùn)練者。這樣訓(xùn)練者可以接收到實(shí)時(shí)反饋,幫助訓(xùn)練者在受到擾動(dòng)時(shí)快速做出反應(yīng)。此外,EPES可確定不同的擾動(dòng)參數(shù),例如擾動(dòng)的傾斜角度、旋轉(zhuǎn)強(qiáng)度和時(shí)間間隔等。該系統(tǒng)目的是專(zhuān)門(mén)改善軀干和上肢平衡反應(yīng)控制。橢圓系統(tǒng)專(zhuān)門(mén)針對(duì)行走過(guò)程中的平衡反應(yīng),這適用于所有老年人,特別適用于患有下肢骨關(guān)節(jié)炎的老年人。此外,橢圓系統(tǒng)可改善老年人[8]、腦卒中[15]和帕金森病[16]等病人的步態(tài)參數(shù)。這是因?yàn)樵跈E圓系統(tǒng)中行走是一項(xiàng)有節(jié)奏的任務(wù),其反射調(diào)節(jié)與常規(guī)行走相似。有數(shù)據(jù)表明,與其他訓(xùn)練工具相比,橢圓系統(tǒng)訓(xùn)練具有優(yōu)勢(shì),因?yàn)槠浒踩b置能夠穩(wěn)固地固定雙下肢,以減少在高強(qiáng)度沖擊下反復(fù)出現(xiàn)的下肢關(guān)節(jié)反作用力,同時(shí)允許以功能性、直立的姿勢(shì)進(jìn)行鍛煉[8]。但是,橢圓系統(tǒng)的擾動(dòng)可能不足以平衡老年人現(xiàn)實(shí)生活中的跌倒情況,對(duì)預(yù)防跌倒的影響目前尚不清楚。
2.3 主動(dòng)系留輔助骨盆裝置(TPAD)
TPAD是一種創(chuàng)新的電驅(qū)動(dòng)機(jī)器人。運(yùn)動(dòng)平臺(tái)為分體式跑步機(jī),由4個(gè)交流電機(jī)安裝在1個(gè)鋼性框架上,并通過(guò)電纜連接到受試者佩戴的織物腰帶上[17]。配有稱(chēng)重傳感器和閉環(huán)控制器(可確保電機(jī)提供正確的張力),10個(gè)攝像頭動(dòng)作捕捉系統(tǒng)。訓(xùn)練者在正常行走過(guò)程中,織物腰帶對(duì)訓(xùn)練者腰部進(jìn)行干擾,同時(shí)稱(chēng)重感受器對(duì)訓(xùn)練者腳部力量檢測(cè),并控制擾動(dòng)時(shí)間,該系統(tǒng)十分適合基于擾動(dòng)的平衡訓(xùn)練。Martelli等[18]初步研究顯示,老年人使用該裝置后對(duì)預(yù)防跌倒有積極的效果并且證明了該裝置可以改善步態(tài)穩(wěn)定性,鑒于在跑步機(jī)和地上行走存在差異,消除跑步機(jī)約束是必不可少的。為了允許在地面行走期間進(jìn)行擾動(dòng),同時(shí)還開(kāi)發(fā)了移動(dòng)系留骨盆輔助裝置(mTPAD)。移動(dòng)系留骨盆輔助裝置是一個(gè)移動(dòng)機(jī)器人平臺(tái),使用后式助行車(chē)為框架,是一種便攜式設(shè)備。該裝置可對(duì)骨盆施加定時(shí)力,以及干預(yù)后的認(rèn)知和功能測(cè)量。此外,該裝置成本低,便于攜帶,有利于在臨床推廣使用。
3" 優(yōu)勢(shì)與效果
3.1 改善平衡
與傳統(tǒng)的平衡訓(xùn)練相比,基于擾動(dòng)的平衡訓(xùn)練具有安全措施,在進(jìn)行外部干擾時(shí)安全裝置可以維持訓(xùn)練者身體的穩(wěn)定性,從而避免不良事件的發(fā)生。有研究證實(shí)了基于擾動(dòng)的平衡訓(xùn)練的可行性[19],基于擾動(dòng)的平衡訓(xùn)練是改善老年人反應(yīng)平衡的最佳干預(yù)措施[20]。Allin等[21]通過(guò)臨床試驗(yàn)證明了基于擾動(dòng)的訓(xùn)練對(duì)跌倒有積極影響。近年來(lái),基于擾動(dòng)的平衡訓(xùn)練在預(yù)防跌倒并降低跌倒率得出了積極的結(jié)果。基于擾動(dòng)的平衡訓(xùn)練使老年人能夠發(fā)展短期和長(zhǎng)期的抗跌倒技能,例如改善老年人的身體平衡性和運(yùn)動(dòng)神經(jīng)反饋,以應(yīng)對(duì)意外的擾動(dòng)[22]。Kim等[23]評(píng)估了為期 8 周的基于擾動(dòng)的平衡訓(xùn)練計(jì)劃在社區(qū)老年人中的有效性,結(jié)果表明基于擾動(dòng)的平衡訓(xùn)練對(duì)老年人的動(dòng)態(tài)平衡控制產(chǎn)生了積極影響,并且還降低了對(duì)跌倒恐懼。一項(xiàng)針對(duì) 166 名社區(qū)老年人的研究報(bào)告稱(chēng),基于跑步機(jī)的擾動(dòng)平衡訓(xùn)練對(duì)于預(yù)防跌倒有著明顯的效果,反應(yīng)較差的老年人在接受基于擾動(dòng)的平衡訓(xùn)練后身體的平衡性得到了提升[24]。Lurie等[11]在老年病醫(yī)院對(duì)衰弱的老年人進(jìn)行了基于擾動(dòng)的平衡訓(xùn)練,得出基于擾動(dòng)的平衡訓(xùn)練對(duì)預(yù)防老年衰弱病人跌倒是可行的。
3.2 提高認(rèn)知能力
隨著年齡的增長(zhǎng),老年人的認(rèn)知能力不斷下降,認(rèn)知能力的下降會(huì)影響老年人的平衡性,容易使老年人發(fā)生跌倒。活動(dòng)可以分為身體訓(xùn)練(即有氧運(yùn)動(dòng)和力量訓(xùn)練)和運(yùn)動(dòng)訓(xùn)練(即平衡、協(xié)調(diào)和柔韌性),身體和運(yùn)動(dòng)訓(xùn)練對(duì)認(rèn)知的改善都是有益的,但運(yùn)動(dòng)訓(xùn)練可能更好地刺激信息處理的變化,尤其是處理視覺(jué)和空間信息的能力[25]。Bhagwat等[26]在基于擾動(dòng)的平衡訓(xùn)練前后運(yùn)用認(rèn)知測(cè)量工具對(duì)訓(xùn)練者進(jìn)行評(píng)估后發(fā)現(xiàn),訓(xùn)練后訓(xùn)練者的認(rèn)知能力得到顯著提升。基于擾動(dòng)的平衡訓(xùn)練被認(rèn)為是一種具有高度復(fù)雜性和神經(jīng)肌肉要求的運(yùn)動(dòng)訓(xùn)練任務(wù)[27]。有研究結(jié)果證實(shí),平衡訓(xùn)練可有效提高大腦信息處理速度,并且發(fā)現(xiàn)基于擾動(dòng)的平衡訓(xùn)練可能對(duì)認(rèn)知功能領(lǐng)域特別有益[28]。Aviles等[29]首次驗(yàn)證了基于擾動(dòng)的平衡訓(xùn)練可以影響老年人的認(rèn)知表現(xiàn)。
3.3 降低跌倒率
跌倒是指突發(fā)、不自主的、非故意的體位改變。隨著我國(guó)老齡化日益加重,老年人跌倒發(fā)生率也在不斷上升。近些年,國(guó)外發(fā)現(xiàn)基于擾動(dòng)的平衡訓(xùn)練對(duì)預(yù)防跌倒的發(fā)生有著積極的意義。Pai等[9]對(duì)基于擾動(dòng)的平衡訓(xùn)練的老年人進(jìn)行了為期12個(gè)月的隨訪(fǎng),發(fā)現(xiàn)跌倒率下降了50%。Okubo等[30]調(diào)查了基于擾動(dòng)的平衡訓(xùn)練對(duì)虛弱或高危老年人跌倒發(fā)生率的影響,從試驗(yàn)結(jié)果得出在擾動(dòng)跑步機(jī)上進(jìn)行反應(yīng)性平衡訓(xùn)練對(duì)于容易跌倒的虛弱老年住院病人是可行的。可見(jiàn),基于擾動(dòng)的平衡訓(xùn)練對(duì)不僅對(duì)預(yù)防老年人跌倒有效,對(duì)衰弱的老年人同樣有效[31]。
4" 不足
4.1 安全裝置需要改進(jìn)
基于擾動(dòng)的平衡訓(xùn)練目前還未出現(xiàn)較重的不良事件,但還是有一些輕微不良事件的報(bào)告。有研究發(fā)現(xiàn),基于擾動(dòng)的平衡訓(xùn)練后部分訓(xùn)練者出現(xiàn)了肌肉酸痛等輕微不良事件,這可能是由于安全裝置與皮膚摩擦或牽拉所致,為減少不良事件的發(fā)生,安全裝置需符合人體工學(xué)[32]。
4.2 最佳擾動(dòng)訓(xùn)練尚不清楚
盡管許多研究證明了基于擾動(dòng)的平衡訓(xùn)練在臨床實(shí)踐中的可行性,但目前很難得出基于擾動(dòng)的平衡訓(xùn)練最佳擾動(dòng)次數(shù)和訓(xùn)練頻率的結(jié)論,并且也沒(méi)有相關(guān)指南[14]。國(guó)外不同學(xué)者對(duì)基于擾動(dòng)的平衡訓(xùn)練的訓(xùn)練頻率和訓(xùn)練量存在較大差異,雖然有研究表明相對(duì)較低的訓(xùn)練劑量有積極效果,但最佳擾動(dòng)訓(xùn)練量尚不清楚[33]。未來(lái)可針對(duì)不同階段的臨床需求設(shè)計(jì)合理的方案,因?yàn)橥挥?xùn)練方案不能滿(mǎn)足不同階段的需求,難以使訓(xùn)練達(dá)到最好效果。因此,需要對(duì)基于擾動(dòng)的平衡訓(xùn)練進(jìn)行更多的臨床試驗(yàn)研究,確定最佳擾動(dòng)訓(xùn)練方案。
4.3 臨床推廣困難
基于擾動(dòng)的平衡訓(xùn)練通過(guò)破壞訓(xùn)練者的穩(wěn)定性并模擬跌倒的情況,從而預(yù)防老年人跌倒的發(fā)生。但該訓(xùn)練設(shè)備的成本高、體型大及訓(xùn)練內(nèi)容可能會(huì)阻礙該訓(xùn)練工具在臨床上的廣泛應(yīng)用[34]。因此,有必要開(kāi)發(fā)替代這些訓(xùn)練工具的簡(jiǎn)便方法或者開(kāi)發(fā)經(jīng)濟(jì)有效且臨床上可行的設(shè)備進(jìn)行擾動(dòng)訓(xùn)練。
5" 小結(jié)
隨著年齡的增長(zhǎng),老年人身體各項(xiàng)機(jī)能逐漸下降,平衡功能慢慢減退,跌倒風(fēng)險(xiǎn)不斷增加,基于擾動(dòng)的平衡訓(xùn)練可有效預(yù)防老年人跌倒的發(fā)生,提高老年人的生活質(zhì)量,實(shí)現(xiàn)健康老齡化這一戰(zhàn)略。通過(guò)臨床研究發(fā)現(xiàn),與傳統(tǒng)的平衡訓(xùn)練相比基于擾動(dòng)的平衡訓(xùn)練對(duì)預(yù)防老年人跌倒效果更為顯著并且持續(xù)時(shí)間長(zhǎng)。早在21世紀(jì)初國(guó)外就開(kāi)始對(duì)社區(qū)老年人進(jìn)行基于擾動(dòng)的平衡訓(xùn)練,積累了豐富的經(jīng)驗(yàn)并獲得了積極的效果。目前,我國(guó)關(guān)于基于擾動(dòng)的平衡訓(xùn)練研究較少,未來(lái)研究人員可對(duì)老年人群進(jìn)行干預(yù)研究,建立完善且適合我國(guó)老年人群的基于擾動(dòng)的平衡訓(xùn)練,降低老年人跌倒的發(fā)生。另外,基于擾動(dòng)的平衡訓(xùn)練由于過(guò)于依賴(lài)設(shè)備,并且設(shè)備體型較大,需要專(zhuān)業(yè)人員在旁進(jìn)行監(jiān)督,在臨床推廣使用較為困難,期望科技人員根據(jù)臨床需要設(shè)計(jì)出體型較小、操作方便、價(jià)格合理的設(shè)備?;跀_動(dòng)的平衡訓(xùn)練是一種很有前途的預(yù)防老年人跌倒的方法。在臨床推廣之前,仍需進(jìn)行大規(guī)模、多中心的臨床干預(yù)試驗(yàn),確保其實(shí)施的可行性。
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(收稿日期:2024-02-10;修回日期:2024-12-05)
(本文編輯 蘇琳)