funÇÕes do sistema cardiovascular durante o...
TRANSCRIPT
![Page 1: FUNÇÕES DO SISTEMA CARDIOVASCULAR DURANTE O EXERCÍCIOarquivos.info.ufrn.br/.../Aula_3_-_Respostas_agudas... · Author Sujects Exercise BP measure Maximum (mmHg) Fleck and Dean13](https://reader034.vdocuments.net/reader034/viewer/2022050222/5f67abe936e30f17e60adba1/html5/thumbnails/1.jpg)
FUNÇÕES DO SISTEMA CARDIOVASCULAR
DURANTE O EXERCÍCIO
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TIPO DE EXERCÍCIO
Dinâmico ou
Isotônico
Estático ou
Isométrico
Contração muscular
e movimento articular
Contração muscular
sem movimento articular
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EXERCÍCIO ESTÁTICO - ISOMÉTRICO
“Quando um músculo é ativado e desenvolve força sem causar
movimento numa articulação” (Fleck e Kraemer)
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FLUXO SANGUÍNEO
RESPOSTAS CARDIOVASCULARES AGUDAS
Quando a contração muscular aumenta acima de 15% da
contração voluntária máxima há um impedimento progressivo do fluxo
sanguíneo para o músculo ativo.
Massa muscular
Vaso sanguíneo
Acima de 70%
oclusão completa
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RESPOSTAS CARDIOVASCULARES AGUDAS
FLUXO SANGUÍNEO
Adaptado de Asmussen Circulation Res. 48:i3-i10, 1981.
20 40 60 80%
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Mecanismo
Componente
Isométrico Acúmulo
Metabólitos
Estimula
Quimiorreceptores
Ativação
Simpática
0
500
1000
1500
2000
2500
Contr
ol20 40 60 80 10
0
Pea
k
AN
S (
un
idad
es/m
in)
Seals DR J. Appl. Physiol. 75: 1426-31, 1993.
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55
60
65
70
75
80
1 2 3 4 5 6
FC
(b
at/
min
)
4.0
4.5
5.0
5.5
6.0
6.5
7.0
1 2 3 4 5 6
DC
(l/
min
)60
70
80
90
100
1 2 3 4 5 6
VS
(m
l/b
at)
Isométrico
Extensão do Joelho
5 minutos
20% CVM
Friedman et al. J. Appl. Physiol. 73: 1982-5, 1992.
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4.0
4.5
5.0
5.5
6.0
6.5
7.0
1 2 3 4 5 6
DC
(l/
min
)
75
85
95
105
115
1 2 3 4 5 6
PA
M (
mm
Hg
)12
14
16
18
20
22
1 2 3 4 5 6
RV
P (
un
ida
de
s)
Isométrico
Extensão do Joelho
5 minutos
20% CVM
Friedman et al. J. Appl. Physiol. 73: 1982-5, 1992.
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-10
-5
0
5
10
15
20
25
FC
VDF VSF VS
DC RVP PAM
(% d
e m
ud
an
ça)
Resposta Cardiovascular - Handgrip – 3 min – 30%CVM
Adaptado de Bastos. MSSE. 32: 1114-18,2000
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Comando
Central Quimior-
receptores RV
RVP X =
PAM
Cont.
+
Pós VSF VDF
Mecanorreceptores
+
ANS
+
ANP
-
VS
DC
+
PAS
PAD
FC
+
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EFEITO DA INTENSIDADE
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INTENSIDADE
0
30
60
90
120
150
180
FC PAS DP
25
50
Adaptado de DeBusk et al. Circulation 58: 368-75, 2000
1 minuto
Isométrico
Braço
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MASSA MUSCULAR
Mão Perna Perna + Braço
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50
60
70
80
90
100
110
120
Rep 1 2 3
FC
(b
at/
min
)
Mão Perna Mão+Perna
80
100
120
140
160
Rep 1 2 3
PA
M (
mm
mH
g)
MASSA MUSCULAR
Isométrico
3 minutos
30% CVM
Adaptado de Seals et al. J. Appl. Physiol. 54: 434-7, 1983.
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0
500
1000
1500
2000
2500
Contr
ol20 40 60 80 10
0
Pea
k
AN
S (
un
idad
es/m
in)
Braço – 35%CVM Dedo – 35%CVM
Seals DR J. Appl. Physiol. 75: 1426-31, 1993.
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Exercício Estático - Isométrico
FC
VS
DC
RVP
PAM
PAS
PAD
Exercício com maior massa
muscular, duração e intensidade
levam a maior aumento da
Resistência Vascular Periférica
(RVP), Pressão Arterial (PA)
média, sistólica e diastólica.
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RESPOSTAS CARDIOVASCULARES
AGUDAS AO EXERCÍCIO RESISTIDO
DINÂMICO
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Exercício Resistido:
Localizado
Contra resistência
Levantamento de Peso
Musculação
Weight Training
Resistance Training
Strength Training
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EXERCÍCIOS RESISTIDOS
Alta Intensidade
Isométrico
Força
Baixa Intensidade
Isotônico
Resistência X
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PA AO LONGO DA REPETIÇÃO
Leg Press Duplo
Adaptado de McCartney. Med. Sci. Sports Exerc. 31:31-7,1999
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PA INTRAARTERIAL
AO LONGO DA SÉRIE
Leg Press Duplo
90% CVM
Até exaustão
Adaptado de MacDougall. J. Appl. Physiol. 58:785-90, 1985.
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(MacDougall. J. Appl. Physiol. 58:785-90, 1985.)
Aumento médio:
320/250 mmHg
Maior Aumento:
480/350 mmHg
Leg Press Duplo
90% 1RM
Até exaustão
PA INTRAARTERIAL AO LONGO DA SÉRIE
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Author Sujects Exercise BP measure Maximum
(mmHg)
Fleck and
Dean13
Athletes
Beginners
Controls
50%, 70%, 80%
e 90% de 1 RM
Intra-arterial SBP = 190
DBP = 150
Harris e Holly21 Hypertensives 40% de 1 RM Auscultation SBP = 155±12
DBP = 87±11
Haslam et al.22 Cardiac Patients 20%, 40%, 60%
e 80% de 1 RM
Intra-arterial SBP = 215±17
DBP = 124±6
Lamotte et al.25 Cardiac Patients 40% e 70% de 1
RM
Pletismografia SBP = 213±25
MacDougall et
al.30
Athletes 95% de 1 RM Intra-arterial SBP = 320
DBP = 250
MacCartney et
al.34
Healthy 60% e 80% de 1
RM
Intra-arterial SBP = 260±9
DBP = 175±12
Nery37 Healthy
Hypertensives
40%, 80% e
100% de 1 RM
Intra-arterial SBP = 231±16
DBP = 128±11
Oliver et al.38 Cardiac Patients 50% de 1 RM Intra-arterial SBP = 180±14
DBP = 116±7
Palatini et al.40 Hypertensives
Normotensives
90% de 1 RM Intra-arterial SBP = 345
DBP = 245
Sale et al.48 Healthy
50%, 70%, 80%,
85%,85% e
87,5% de 1 RM
Intra-arterial SBP = 360
DBP = 234
Wescott e
Howes54
Young
Elderly
10 RM, 10 RM –
2 kg
10 RM – 4,5 kg
Auscultatation SBP = 165±5
DBP = 75±3
Wiecek et al.55 Cardiac Patients 40% e 60% de 1
RM
Intra-arterial SBP = 249±16
DBP = 152±12
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Factors of Influence
Population
Medication
Intensity
Concentric fatigue
Intervals
Sets, repetitions, exercises
BP measurement
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Massa Muscular
DAC
Leg-press
duplo
100
120
140
160
180
200
220
240
PAS PAD
(mm
Hg
)
1 arm-curl
1 leg-press
2 leg-press
Haslam et al. J. Cardiop. Rehabil. 8:213-25, 1988
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Início
138/67 mmHg
Fadiga Concêntrica
242/113 mmHg
Nery, 2005
Riscos – Resistidos - Hipertenso
Extensão de pernas - 40% CVM – até exaustão
50
70
90
110
130
150
170
190
210
230
250 1
10
19
28
37
46
55
64
73
82
91
10
0
10
9
118
(mm
Hg
)
Início Redução da Velocidade
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Nery et al Clinics 2010
POPULATION
hypertensives (10) Normotensives (10)
40 % of 1RM To Exhaustion Leg Extension
Hypertensives Normotensives
Repouso = 140/80 mmHg
S1, RML = 229/125
S2, PML = 224/121
S3, RML = 239/128
Repouso = 124/66 mmHg
S1, RML = 186/110
S2, PML = 188/113
S3, RML = 187/111
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Nery et al. Clinics, 2010
POPULATION
hypertensives (10) Normotensives (10)
40 e 80% of 1RM To Exhaustion Leg Extension
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Medication
Hipertensive Subject
Placebo (black circles) and atenolol (open circles).
Leg extension
80% of 1RM until concentric fatigue Gomides et al. BJCP, 2010
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Medication
Hipertensive Subject
Placebo (black circles) and atenolol (open circles).
Leg extension
80% of 1RM until concentric fatigue Gomides et al. BJCP, 2010
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DAC
Leg-press
Haslam et al. J. Cardiop. Rehabil. 8:213-25, 1988
210
7
20% 1RM 40% 1RM
60% 1RM
170
7
80% 1RM
Intensity (Same Repetition Number)
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40% of 1RM
80% of 1RM
Intensity to Fatigue
0
50
100
150
200
250
HT NT
SB
P (
mm
Hg
)
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Beggining
Moderate Fatigue
Concentric Fatigue
Conc - Moderate
+259 mmHg 0
50
100
150
200
250
Hypertensives Normotensives
SB
P (
mm
Hg
)
* * $ * $
* * $ * $
#
# #
Moderate Fatigue = reduction of movement velocity Gomides et al., 2007
EXERCISE INTENSITY AND CONCENTRIC FAILURE
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INTERVALS AND SETS
Nery et al. Clinics, 2010/Gomides et al. BJCP 2010
Hypertensives Hypertensives
45 seconds of pause 90 seconds of pause
40 % of 1RM 3 sets
To Exhaustion Leg Extension
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0 50 100 150 200100
150
200
250
300
3x15:88s
45x1:4s
9x5:22s
PA
S (
mm
Hg)
Tempo (s)
Paulo, SBH 2011
SETS, REPETITIONS AND INTERVALS
-20
0
20
40
60
803x15:88s
45x1:4s
9x5:22s
S1 P1 S2 P2 S3 S1 P1 S2 P2 S3S1 P1 S2 P2 S3
# # # #
*
**
Delt
a P
AD
(m
mH
g)
#
> Sets
< repetitions
> intervals
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Autor Amostra Exercício Medida da PA Resposta Máxima
Lamote et al., 2005 DAC 40 e 70% 1RM
Finapress PAS=21325
Haslam et al., 1988 DAC 20,40,60, 80%1RM
Intraarterial PAS=2157
PAD=1246
Wiecek et al., 1990 DAC 40,60%1RM
Intraarterial PAS=24916
PAD=15212
Olivier et al.,2001 Transp 50% 1RM
Intraarterial PAS=18014
PAD=1167
Wescott e Howes,
1983
Jovens
Idosos
10rep – 10RM, 10RM-2kg,
10RM-4,5 kg
Auscultatorio PAS = 1655
PAD =753
Freedson et al.,
1984
Saud 25 e 50% 1RM Intraarterial PAS=24514
PAD=16010
MacDougall et al.,
1985
Atletas 95% 1RM
Intraarterial PAS=320
PAD=250
Harris e Holly,
1987
HT 40% 1RM Auscultatório
pós PAS=15512
PAD=8711
McCartney et al.,
1993
Saud 60 e 80% 1RM Intraarterial PAS=2609
PAD=17512
Fleck and Dean,
1987
Atletas
Novatos
Controle
90,80,70,50%1RM
Intraarterial PAS=190
PAD=150
Sale et al., 1994 Saud 50,70,80,85,87.5%RM
Intraarterial PAS=360
PAD=234
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Wiecek et.al. Am. J. Cardiol, 1990
Intra-arterial
Auscultatory
Auscultatory
Inactive limb - during
13 a 15% lower
Immediatly after
31 a 34% lower
BLOOD PRESSURE MEASUREMENT
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BLOOD PRESSURE MEASUREMENT
Gomides et al. IJSM, 2010
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BLOOD PRESSURE DURING RESISTANCE EXERCISE
SUMMARY
Substantial increase in both Systolic and Diastolic BP
Greater BP increase
Intensity
concentric fatigue
Pause duration
Minimize BP – Increase sets, reduce repetitions, increase pauses,
and stop at MODERATE fatigue
Blood Pressure Measurement
Changes are possible to be assessed with Finometer
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Mechanisms
Atenolol
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Mechanism
Gomides et al.
BJCP, 2010
100%1RM
80%1RM
40%1RM
Atenolol
BP in the 1st set
CO important
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Mechanisms
Anlodipino
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80
110
140
170
PRÉ S1 I1 S2 I2 S3 I3
PA
D (m
mH
g)
*
**
*
**
$$
***
#
##
&
* ≠ Pré; # ≠ Placebo; $ ≠ S1; & ≠ S2, () efeito principal na ANOVA (P<0,05).
Souza et al. SBH, 2011
Mechanism
Anlodipíno
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Aumento da PA no exercício Resistido
Não é controlável
Mas pode ser minimizado
• Estar medicado
• Estar controlado ( <160/105 mmHg)
• Menor massa
•Baixa intensidade
•Parar antes da fadiga ( vel movimento)
• Pausa longas entre as séries
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PA
no teste de
1RM 120
140
160
180
200
220
240
260
REP S1
PA
S (
mm
Hg)
100% de 1RM 80% de 1RM 40% de 1RM
¶
*
*
120
140
160
180
200
220
240
260
REP S1
PA
S (
mm
Hg)
100% de 1RM 80% de 1RM 40% de 1RM 100% de 1RM 80% de 1RM 40% de 1RM
#
*
*
60
80
100
120
140
REP S1
PA
D (
mm
Hg
)
valor combinado intensidade (100%, 80% e 40% de 1RM)
*
60
80
100
120
140
REP S1
PA
D (
mm
Hg
)
valor combinado intensidade (100%, 80% e 40% de 1RM) valor combinado intensidade (100%, 80% e 40% de 1RM)
*
Hipertensos
* Diferente do rep
# Diferente de 100%
#
*
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Manobra de Valsalva:
- Proteção ?
- Risco ?
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VALSALVA
Adaptado de MacDougall. J. Appl. Physiol. 58:785-90, 1985.
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SEGURANÇA – VASALVA
Pressão
Intratorácica
FAZER Pressão Transmural
Protege Cérebro
Pressão
Cérebro Espinhal
PA
PCE = transmural = 0
PAS
PAD EVITAR
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SEGURANÇA – VASALVA
Valsalva
+
Exercício
PA = Valsalva +
exercício
Pressão
Cérebro Espinhal = Valsalva
Pressão Transmural
= SÓ EXERCÍCIO
PA
PCE = transmural = exercício
Val+exer
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até 75% de 1RM- ocasionalmente
85% de 1RM-inevitável
MacDougall et.al. J. Appl. Physiol., 1992
• Obrigatória em + 80% CVM
Não se indica Valsalva no treino ?
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SEGURANÇA – VASALVA
• Obrigatória em + 80% CVM
• Pressão Intratorácica • Pressão Arterial Sistólica
• Pressão Arterial Diastólica
• PAD
• Perfusão Coronária
• RV
• VS
• Pressão Intratorácica
• Pressão Cérebro Espinhal
• Pressão Transmural
• Protege Cérebro ????
? Não se indica Valsalva no treino