Nội dung được dịch bởi AI, chỉ mang tính chất tham khảo
Đứng lâu gây tăng độ cứng của động mạch chi dưới
Tóm tắt
Các bàn làm việc đứng gần đây đã được khuyến khích như một sự thay thế lành mạnh cho việc ngồi. Tuy nhiên, hiện tại vẫn chưa rõ việc đứng lâu có ảnh hưởng như thế nào đến độ cứng của động mạch, một chỉ số tiên đoán sức khỏe tim mạch. Mục đích của nghiên cứu này là hai phần: quan sát sự thay đổi độ cứng động mạch, được đánh giá bằng vận tốc sóng mạch (PWV), sau một khoảng thời gian 2 giờ đứng, và xác định xem những khoảng đi bộ ngắn, gián đoạn có cung cấp lợi thế so với việc chỉ đứng hay không. Mười chín người lớn đã được đánh giá độ cứng động mạch thông qua vận tốc sóng mạch. PWV trung tâm (CPWV), PWV ngoại vi trên (UPWV) và PWV ngoại vi dưới (LPWV) đã được đánh giá trước (nằm ngửa), trong quá trình đứng (phút 10, 60, và 120), và sau (nằm ngửa) khoảng thời gian đứng 2 giờ. Trong một thử nghiệm, những người tham gia đứng yên tại một bàn đứng trong 2 giờ. Trong thử nghiệm khác, những người tham gia thực hiện các khoảng nghỉ đi bộ 5 phút sau mỗi 25 phút đứng. Sau 2 giờ đứng, PWV nằm ngửa (85.8 ± 90.1 cm/s) và đứng (303.4 ± 390.2 cm/s), LPWV đã tăng lên không phụ thuộc vào thử nghiệm (tức là, hiệu ứng chính của thời gian; p < 0.001). Các khoảng nghỉ đi bộ trong 2 giờ đứng không làm giảm đáng kể những thay đổi này. Ngoài ra, CPWV trong tư thế đứng giảm theo thời gian (− 38.5 ± 61.5 cm/s; p = 0.04). Tuy nhiên, UPWV, dù trong tư thế đứng hay nằm ngửa, không thay đổi trong suốt thời gian đứng (p > 0.05). Những phát hiện này cho thấy việc đứng lâu làm tăng các chỉ số độ cứng động mạch và không có bằng chứng nào cho thấy việc nghỉ đi bộ làm giảm phản ứng này.
Từ khóa
#độ cứng động mạch #vận tốc sóng mạch #bàn làm việc đứng #sức khỏe tim mạchTài liệu tham khảo
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