专业自行车心率区间计算器，免费计算LTHR和功率区间，优化心率训练效果。支持多种训练强度设置、卡路里消耗计算，帮助骑行爱好者科学制定训练计划，提升运动表现。
{
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"pv": 15,
"globalHotValue": 0,
"updateDt": 1765907302372,
"hotValue": 0,
"todayChainPv": 0,
"todayGlobalPv": 0,
"americaHotValueDouble": 0,
"globalHotValueDouble": 0,
"todayAmericaPv": 0,
"americaHotValue": 0,
"selectedValueDouble": 691,
"chinaHotValueDouble": 0,
"selectedValue": 691,
"chinaHotValue": 0,
"hotValueDouble": 0
}
免费在线链条长度计算器，专业计算自行车所需链条长度。支持无参考链条情况下的精确计算，提供简单和严格公式两种计算模式，确保链条长度的完整性和精确性。
{
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"pv": 19,
"globalHotValue": 2,
"updateDt": 1765907302308,
"hotValue": 0.8,
"todayChainPv": 1,
"todayGlobalPv": 2,
"americaHotValueDouble": 1,
"globalHotValueDouble": 2,
"todayAmericaPv": 1,
"americaHotValue": 1,
"selectedValueDouble": 691,
"chinaHotValueDouble": 1,
"selectedValue": 691,
"chinaHotValue": 1,
"hotValueDouble": 0.8
}
