こんにちは。
あなたはじぶんが賢いと思っていますか？
今回は
- どうやったら賢くなるのか
- むかしのひとは頭が良かったのか
- 筋トレしているひとは頭がいいのか
といった疑問に答えていきます。
わたしは、じぶんの身体について知るために歴史も学んでみました。
そのなかで、じつは今のわたしたちよりも、祖先である狩猟民族は賢かったのかもしれないと考えました。
というより、今のわたしたちがじぶんから頭の悪くなる生活をしているのかもしれません。
根拠となるキーワードは”タンパク質”と”筋トレ”です。
筋トレをするひとは、プロテインを飲みます。
タンパク質は筋肉をつくるものだからです。
またプロテインはギリシャ語で「第一となるもの」と言われています。
つまり、古来からタンパク質は一番たいせつだとされていたのです。
それもそのはず、タンパク質には3つのちからがあるからです。
それでは最後までよろしくおねがいします。
狩猟民族の主食はなに？
ずばり、お肉やお魚です。
狩猟民族の時代は、まだお米などはなく、今の生活とはまったく違います。
お米や小麦は、農耕民族になってからです。
狩猟民族という名の通り、動物を狩りに行き、狩った動物を食べていました。
つまり、動物のお肉やお魚ということになります。
ただ、1つ気になることがあります。
なぜ狩猟民族は、3食しっかり食べられないときもあるのに、高いパフォーマンスで狩猟をつづけられたのかということです。
日本のことわざにもあります。
腹が減っては戦はできぬということわざあるように、お腹が空いていたら狩猟はむずかしくなるのではないでしょうか？
ということで、調べてみました。
その結果、狩猟民族はタンパク質重視の食事と運動をしているからだと考えたのです。
まずはタンパク質の力を知ろう
お肉やお魚を主食にしていることで、現代人とはタンパク質の量が違います。
では、タンパク質は身体にとってどんな役割があるのか3つ紹介します。
- 全身の細胞に”酸素や栄養”を運ぶ
- ”脳や心、自律神経”を安定させる
- ”病原体”と戦う、免疫もタンパク質である
タンパク質は、筋肉をつけるだけでなく、身体を維持するために必要だったのです。
つまり、1のはたらきで細胞を支え、2でじぶんの精神面を安定させる。
そして動物などの外的要因によるストレスをうけつつ、自己免疫によって病気から身を守るためにタンパク質はちからを発揮していたということです。
狩猟民族のすごさを紹介
狩猟民族は1日に3～4時間かけて狩猟をしていました。
現代人は、平均8時間以上はたらいています。
わたしは、はたらきすぎだと感じています。
はなしは変わり、狩猟民族の狩りをイメージしてみましょう。
あなたは大草原にいます。
どこに獲物がいるかわからない緊張感、そして空腹との戦い。
獲物を見つけるが、こちらが見つかるわけにはいけない。
空腹だけれど、ゆっくりかつ素早く近寄り、一気に襲い掛かる。
そして抵抗しなくなるまで抑え、持ち帰る。
なので、行きも帰りも気は抜けない。
想像するだけでも、息をのむと思います。
また狩りをする獲物も、小さなうさぎから巨大なマンモスをあいてにすることもあると思います。
そんなときに発揮する集中力は、並外れているでしょう。
もしかしたらゾーンに入っているかもしれません。
それにしても、狩猟民族はどうして空腹にも関わらず集中力を発揮できるのでしょうか？
また、狩猟をするためには、体調も重要になるでしょう。
たくさんの困難をのりこえつづけてこれた理由として、狩猟民族の運動量も関係しているのではないかと考えました。
筋肉と血流のことを知ろう
タンパク質のはなしは終わり、つぎは筋肉についてです。
狩猟民族の狩りは、現代人にとって筋トレとおなじです。
- ちからを入れて獲物狩る腕力
- 素早く移動する瞬発力
- 歩きつづける持久力
食べるためとはいえ、筋トレとなっています。
そして筋肉こそ狩猟民族の健康を守り、高い集中力を維持できる要因となっていたのです。
筋肉には、血管のポンプの役割もあり、筋肉を動かすことによって血流が良くなります。
手足の冷えは血管のポンプが弱いのかもしれません。
つぎに、血流がよくなるとどうなるのか
- 質の良い睡眠
- 集中力の持続
- 何事にも積極的になる
という効果を得られます。
なので筋トレや運動によって健康になれるし、前向きになり自信をもって生活できるようになるのです。
では、本題である筋肉をつけることによってじつは頭が賢くなるということもおはなしします。
賢くなる科学的理由
科学的な理由として、まず脳には「運動野」という体の動きを司る部分があります。
運動野から脳は指令を出し、体は動くということです。
たとえば、鉛筆を持つと頭で考え、腕や指に指令を送ります。
そして体が動き、鉛筆を持てるようになるということです。
無意識にやっていることなので、普段は気にならないでしょう。
では、指令を受けて体は動くのですが、反対に体を動かすことによって脳に刺激を送れます。
なので体を動かす筋トレを続けると、刺激を受けた脳と体の間の神経細胞のつながりを太くできます。
よって脳を活性化できるのです。
そして脳を活性化すると、運動野だけでなく同じ脳である「海馬」や「前頭葉」も一緒に活性化します。
したがって、記憶力や思考・判断・集中力なども向上するのです。
つまり、筋トレをすることによって脳内に刺激を与え活性化させることによって、賢くなれるということです。
筋トレの恩恵を身をもって感じているからこそ、成功者の多くは筋トレをしているのでしょう。
まとめ
狩猟民族は現代人よりも
- 健康
- 賢い
- 筋肉ムキムキ
だったのでしょう。
たしかに、わたしたちは便利な道具をつくる脳はありますが、身体の構造は狩猟民族とそれほどかわらないです。
ならば、タンパク質重視の食生活や、筋トレや運動をすることでたくさんのメリットを感じられるのではないでしょうか？
じぶんの身体はじぶんで守る。
最後までお読みいただきありがとうございます。
きょうもわたしはあなたと出会えて「運がいい」
ありがとうございました。
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