<p><span style="font-size:16px;font-family:宋体">国内外科研成果表明，最适宜的锻炼强度在</span><span style="font-size:16px;font-family:'Calibri',sans-serif">65%</span><span style="font-size:16px;font-family:宋体">～</span><span style="font-size:16px;font-family:'Calibri',sans-serif">75%</span><span style="font-size:16px;font-family:宋体">，</span> <span style="font-size:16px;font-family:宋体">即心率在</span><span style="font-size:16px;font-family:'Calibri',sans-serif"><span style="font-size: 16px; font-family: Calibri, sans-serif; text-decoration: underline;"> </span></span><span style="font-size:16px;font-family:宋体">之间。</span></p>
- A. <p><span style="font-size:16px;font-family: 'Calibri',sans-serif">120</span><span style="font-size:16px;font-family:宋体">～</span><span style="font-size:16px;font-family:'Calibri',sans-serif">130</span><span style="font-size:16px;font-family:宋体">次</span><span style="font-size:16px;font-family:'Calibri',sans-serif">/min</span></p>
- B. <p><span style="font-size:16px;font-family: 'Calibri',sans-serif">110</span><span style="font-size:16px;font-family:宋体">～</span><span style="font-size:16px;font-family:'Calibri',sans-serif">140</span><span style="font-size:16px;font-family:宋体">次</span><span style="font-size:16px;font-family:'Calibri',sans-serif">/min</span></p>
- C. <p><span style="font-size:16px;font-family: 'Calibri',sans-serif">130</span><span style="font-size:16px;font-family:宋体">～</span><span style="font-size:16px;font-family:'Calibri',sans-serif">150</span><span style="font-size:16px;font-family:宋体">次</span><span style="font-size:16px;font-family:'Calibri',sans-serif">/min</span></p>
- D. <p><span style="font-size:16px;font-family: 'Calibri',sans-serif">160</span><span style="font-size:16px;font-family:宋体">～</span><span style="font-size:16px;font-family:'Calibri',sans-serif">180</span><span style="font-size:16px;font-family:宋体">次</span><span style="font-size:16px;font-family:'Calibri',sans-serif">/min</span></p>
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