要 。       
      第 三 是 机 体 能 量 供 应 特 点 。 赛 鸽 在 长 时 间 （ 如 凡 个 小 时 或 者 更 长 时 间 ） 的 飞 行 运 动 中 ， 单 位 时 间 内 能 量 消 耗 并 不 大 ， 心 血 管 系 统 和 呼 吸 系 统 能 够 保 证 每 分 钟 供 给 需 氧 量 。 另 外 ， 在 长 时 问 耐 力 运 动 中 ， 肌 肉 中 糖 原 、 肝 糖 原 逐 渐 消 耗 为 能 使 肌 肉 继 续 工 作 提 供 能 量 的 来 源 ， 机 体 必 须 动 员 脂 肪 供 能 来 满 足 飞 行 运 动 的 需 要 。 随 着 运 动 时 问 延 长 ， 脂 肪 氧 化 供 能 的 比 例 增 大 ， 提 高 了 动 用 脂 肪 供 能 的 能 力 。 由 此 可 见 ， 在 神 经 系 统 的 支 配 厂 机 体 动 员 脂 肪 供 能 的 能 力 和 水 平 ， 是 赛 鸽 在 竞 翔 返 巢 活 动 中 耐 力 素 质 的 物 质 基 础 。         
      二 ． 耐 力 素 质 的 机 体 能 量 供 应           
      从 耐 力 素 质 发 展 因 素 分 析

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